Hospital Patient Monitoring System

System Decomposition Report — Generated 2026-03-27 — UHT Journal / universalhex.org

About this report

This report was generated autonomously by the UHT Journal systems engineering loop. An AI agent decomposed the system into subsystems and components, classified each using the Universal Hex Taxonomy (a 32-bit ontological classification system), generated traced requirements in AIRGen, and built architecture diagrams — all without human intervention.

Every component and subsystem is assigned an 8-character hex code representing its ontological profile across 32 binary traits organised in four layers: Physical (bits 1–8), Functional (9–16), Abstract (17–24), and Social (25–32). These codes enable cross-domain comparison — components from unrelated systems that share a hex code or high Jaccard similarity are ontological twins, meaning they occupy the same structural niche despite belonging to different domains.

Duplicate hex codes are informative, not errors. When two components share the same code, it means UHT classifies them as the same kind of thing — they have identical trait profiles. This reveals architectural patterns: for example, a fire control computer and a sensor fusion engine may share the same hex because both are powered, synthetic, signal-processing, state-transforming, system-essential components. The duplication signals that requirements, interfaces, and verification approaches from one may transfer to the other.

Requirements follow the EARS pattern (Easy Approach to Requirements Syntax) and are traced through a derivation chain: Stakeholder Needs (STK) → System Requirements (SYS) → Subsystem Requirements (SUB) / Interface Requirements (IFC) → Verification Plan (VER). The traceability matrices at the end of this report show every link in that chain.

Referenced Standards

Standard	Title
IEC 60601	—
IEC 60601-1-8	Alarm systems — General requirements, tests, and guidance
IEC 62304	Medical device software — Software life cycle processes
IEC 80001-1	—
IEEE 11073	—
IEEE 1588	Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems
IEEE 802.1Q	—

Acronyms & Abbreviations

Acronym	Expansion
ARC	Architecture Decisions
CCCS	Completeness, Consistency, Correctness, Stability
EARS	Easy Approach to Requirements Syntax
IFC	Interface Requirements
STK	Stakeholder Requirements
SUB	Subsystem Requirements
SYS	System Requirements
UHT	Universal Hex Taxonomy
VER	Verification Plan

101

Requirements

Classified Entities

Subsystems

Diagrams

Relationships

System Context

flowchart TB
  n0["system<br>Hospital Patient Monitoring System"]
  n1["actor<br>Clinical Staff"]
  n2["actor<br>Patient"]
  n3["actor<br>Electronic Health Record"]
  n4["actor<br>Hospital IT Infrastructure"]
  n5["actor<br>Regulatory Authority"]
  n2 -->|Vital signs| n0
  n0 -->|Alarms, waveforms, trends| n1
  n1 -->|Config and acknowledgements| n0
  n0 -->|Patient data via HL7 FHIR| n3
  n3 -->|ADT events| n0
  n4 -->|Network services| n0

Hospital Patient Monitoring System — Context

System Decomposition

flowchart TB
  n0["system<br>Hospital Patient Monitoring System"]
  n1["subsystem<br>Vital Signs Acquisition"]
  n2["subsystem<br>Central Monitoring Station"]
  n3["subsystem<br>Alarm Management"]
  n4["subsystem<br>Clinical Data Integration"]
  n5["subsystem<br>Network and Communication"]
  n0 -->|contains| n1
  n0 -->|contains| n2
  n0 -->|contains| n3
  n0 -->|contains| n4
  n0 -->|contains| n5
  n1 -->|Raw vital sign data| n5
  n5 -->|Aggregated waveforms| n2
  n5 -->|Vital sign streams| n3
  n3 -->|Alarm notifications| n2
  n5 -->|Monitoring data| n4

Hospital Patient Monitoring System — Decomposition

Decomposition Tree

Hospital Patient Monitoring System 55FF7319
- Vital Signs Acquisition Subsystem D4E55219
  - ECG Acquisition Module D4E55019
  - Pulse Oximetry Module D4CC3018
  - NIBP Measurement Module D6DD3018
  - Temperature Measurement Module D48D1218
  - Signal Conditioning Unit 50F53018
- Central Monitoring Station 54ED5218
  - Display Rendering Engine 54F57319
  - Patient Tile Manager 40B53118
  - Trend Analysis Engine 50F73319
  - Alert Dashboard Controller 50BD7B18
  - Multi-bed Overview Processor 50F77319
- Alarm Management Subsystem 51F77B19
  - Alarm Detection Engine 41F77B19
  - Alarm Prioritization Module 41B77959
  - Alarm Notification Controller 55FD7A18
  - Alarm Fatigue Mitigation Unit 41B77B19
  - Alarm History and Audit Logger 40853359
- Clinical Data Integration Subsystem 40B57359
  - HL7/FHIR Interface Engine 51F77959
  - Patient ADT Manager 41B73B18
  - Clinical Data Repository 40851119
  - Data Export Controller 40F77B19
  - Terminology and Coding Service 50A5F158
- Network and Communication Subsystem 50A57019
  - Medical-Grade Network Switch D2A51018
  - Wireless Access Controller 51B77018
  - Time Synchronization Service 40A57B58
  - Clinical Network Firewall 50A53859
  - Message Broker and Data Distribution Service 40F57319

Stakeholder Requirements (STK)

Ref	Requirement	V&V	Tags
STK-STAKEHOLDERNEEDS-001	The Hospital Patient Monitoring System SHALL continuously monitor patient vital signs including heart rate, blood pressure, oxygen saturation, respiration rate, and body temperature without interruption during the patient's stay.	—	stakeholder, session-169
STK-STAKEHOLDERNEEDS-002	The Hospital Patient Monitoring System SHALL alert clinical staff within clinically acceptable timeframes when patient vital signs deviate from prescribed thresholds.	—	stakeholder, session-169
STK-STAKEHOLDERNEEDS-003	The Hospital Patient Monitoring System SHALL integrate with the hospital Electronic Health Record system to provide a unified patient data view and avoid duplicate data entry.	—	stakeholder, session-169
STK-STAKEHOLDERNEEDS-004	The Hospital Patient Monitoring System SHALL comply with applicable medical device regulations including IEC 60601, IEC 62304, and FDA 21 CFR Part 820 quality system requirements.	—	stakeholder, session-169
STK-STAKEHOLDERNEEDS-005	The Hospital Patient Monitoring System SHALL reduce clinically non-actionable alarms to mitigate alarm fatigue among nursing staff while maintaining sensitivity to genuine patient deterioration events.	—	stakeholder, session-169
STK-STAKEHOLDERNEEDS-006	The Hospital Patient Monitoring System SHALL protect patient health information in accordance with HIPAA privacy and security rules and hospital data governance policies.	—	stakeholder, session-169

System Requirements (SYS)

Ref	Requirement	V&V	Tags
SYS-SYSTEM-LEVELREQUIREMENTS-001	The Hospital Patient Monitoring System SHALL acquire and display continuous ECG waveforms with a minimum of 3-lead configuration at a sampling rate of no less than 250 Hz.	—	system, vital-signs, session-169
SYS-SYSTEM-LEVELREQUIREMENTS-002	The Hospital Patient Monitoring System SHALL measure and display pulse oximetry (SpO2) with an accuracy of +/- 2% in the range of 70-100% saturation.	—	system, vital-signs, session-169
SYS-SYSTEM-LEVELREQUIREMENTS-003	The Hospital Patient Monitoring System SHALL perform non-invasive blood pressure measurements at configurable intervals ranging from 1 minute to 480 minutes and on manual demand.	—	system, vital-signs, session-169
SYS-SYSTEM-LEVELREQUIREMENTS-004	When a monitored vital sign exceeds a configured alarm threshold, the Hospital Patient Monitoring System SHALL generate an audible and visual alarm at the bedside within 10 seconds of threshold violation.	—	system, alarm, session-169
SYS-SYSTEM-LEVELREQUIREMENTS-005	The Hospital Patient Monitoring System SHALL display real-time vital signs and alarm status for all monitored patients on the central monitoring station simultaneously, supporting a minimum of 32 patients per station.	—	system, display, session-169
SYS-SYSTEM-LEVELREQUIREMENTS-006	The Hospital Patient Monitoring System SHALL export patient vital sign data and alarm events to the Electronic Health Record using HL7 FHIR R4 observation resources.	—	system, integration, session-169
SYS-SYSTEM-LEVELREQUIREMENTS-007	The Hospital Patient Monitoring System SHALL automatically associate bedside monitors with patient identity upon receiving ADT admit messages and disassociate upon discharge.	—	system, integration, session-169
SYS-SYSTEM-LEVELREQUIREMENTS-008	The Hospital Patient Monitoring System SHALL support configurable alarm delay periods of 0 to 60 seconds per parameter to suppress transient threshold crossings caused by patient movement or artifact.	—	system, alarm, session-169
SYS-SYSTEM-LEVELREQUIREMENTS-009	The Hospital Patient Monitoring System SHALL encrypt all patient data in transit using TLS 1.2 or higher and at rest using AES-256 encryption.	—	system, security, session-169
SYS-SYSTEM-LEVELREQUIREMENTS-010	The Hospital Patient Monitoring System SHALL maintain continuous monitoring operation during a single network path failure through redundant communication links with automatic failover completing within 5 seconds.	—	system, network, session-169
SYS-SYSTEM-LEVELREQUIREMENTS-011	The Hospital Patient Monitoring System SHALL store a minimum of 72 hours of trending data per patient including all monitored vital sign parameters at one-minute resolution.	—	system, storage, session-169
SYS-SYSTEM-LEVELREQUIREMENTS-012	The Hospital Patient Monitoring System SHALL meet the safety and essential performance requirements of IEC 60601-1-8 for medical electrical equipment alarm systems.	—	system, regulatory, session-169

Subsystem Requirements (SUB)

Ref	Requirement	V&V	Tags
SUB-SUBSYSTEMREQUIREMENTS-001	The ECG Acquisition Module SHALL acquire continuous electrocardiogram signals using a minimum 3-lead electrode configuration with a common-mode rejection ratio of at least 90 dB.	—	subsystem, vital-signs-acquisition, ecg, session-170
SUB-SUBSYSTEMREQUIREMENTS-002	The ECG Acquisition Module SHALL digitise the analogue ECG signal with a bandwidth of 0.05 Hz to 150 Hz and a minimum sampling rate of 500 samples per second per channel.	—	subsystem, vital-signs-acquisition, ecg, session-170
SUB-SUBSYSTEMREQUIREMENTS-003	The Pulse Oximetry Module SHALL measure arterial oxygen saturation (SpO2) with an accuracy of +/- 2% over the range of 70% to 100% SpO2.	—	subsystem, vital-signs-acquisition, spo2, session-170
SUB-SUBSYSTEMREQUIREMENTS-004	The Pulse Oximetry Module SHALL derive pulse rate from the photoplethysmogram signal with an accuracy of +/- 3 beats per minute over the range 30 to 250 bpm.	—	subsystem, vital-signs-acquisition, spo2, session-170
SUB-SUBSYSTEMREQUIREMENTS-005	The NIBP Measurement Module SHALL perform oscillometric blood pressure determination with an accuracy of +/- 5 mmHg for systolic and diastolic pressures over the range 40 to 260 mmHg.	—	subsystem, vital-signs-acquisition, nibp, session-170
SUB-SUBSYSTEMREQUIREMENTS-006	The NIBP Measurement Module SHALL limit cuff pressure to a maximum of 300 mmHg and SHALL automatically deflate the cuff within 180 seconds of inflation initiation to prevent tissue ischaemia.	—	subsystem, vital-signs-acquisition, nibp, safety, session-170
SUB-SUBSYSTEMREQUIREMENTS-007	The Signal Conditioning Unit SHALL reject 50 Hz and 60 Hz mains interference from all sensor input channels by at least 40 dB without attenuating the physiological signal bandwidth.	—	subsystem, vital-signs-acquisition, signal-conditioning, session-170
SUB-SUBSYSTEMREQUIREMENTS-008	While operating on battery backup, the Vital Signs Acquisition Subsystem SHALL continue acquiring all vital sign parameters without data loss for a minimum of 30 minutes.	—	subsystem, vital-signs-acquisition, reliability, session-170
SUB-SUBSYSTEMREQUIREMENTS-009	The Alarm Detection Engine SHALL evaluate each incoming vital sign sample against the configured upper and lower alarm thresholds for that parameter within 500 milliseconds of receipt.	—	subsystem, alarm-management, session-171
SUB-SUBSYSTEMREQUIREMENTS-010	The Alarm Detection Engine SHALL support compound alarm rules that evaluate Boolean combinations of up to four vital sign parameters to detect multi-parameter clinical deterioration patterns.	—	subsystem, alarm-management, session-171
SUB-SUBSYSTEMREQUIREMENTS-011	The Alarm Prioritization Module SHALL classify each alarm condition into one of three priority levels — crisis, warning, or advisory — in accordance with IEC 60601-1-8 Clause 6.3.	—	subsystem, alarm-management, session-171
SUB-SUBSYSTEMREQUIREMENTS-012	When a patient record indicates a known pre-existing condition for a monitored parameter, the Alarm Prioritization Module SHALL adjust the alarm priority according to the clinician-configured exception rules for that condition.	—	subsystem, alarm-management, session-171
SUB-SUBSYSTEMREQUIREMENTS-013	The Alarm Fatigue Mitigation Unit SHALL apply a configurable alarm delay of 0 to 60 seconds per parameter before promoting a threshold crossing to an active alarm, suppressing transient artifact-induced violations.	—	subsystem, alarm-management, session-171
SUB-SUBSYSTEMREQUIREMENTS-014	The Alarm Fatigue Mitigation Unit SHALL never suppress or delay crisis-priority alarms regardless of delay configuration or suppression rules.	—	subsystem, alarm-management, session-171
SUB-SUBSYSTEMREQUIREMENTS-015	When an alarm passes through fatigue mitigation filtering, the Alarm Notification Controller SHALL activate both an audible annunciator and a visual indicator at the bedside within 2 seconds of receiving the filtered alarm event.	—	subsystem, alarm-management, session-171
SUB-SUBSYSTEMREQUIREMENTS-016	The Alarm Notification Controller SHALL transmit crisis and warning alarms to the nurse call system and designated mobile devices within 5 seconds of alarm activation.	—	subsystem, alarm-management, session-171
SUB-SUBSYSTEMREQUIREMENTS-017	When a crisis alarm remains unacknowledged for a configurable escalation period (default 120 seconds), the Alarm Notification Controller SHALL escalate the notification to the charge nurse and unit supervisor.	—	subsystem, alarm-management, session-171
SUB-SUBSYSTEMREQUIREMENTS-018	The Alarm History and Audit Logger SHALL record every alarm event — including detection, prioritization, suppression, notification, acknowledgement, and silencing — with a UTC timestamp, patient identifier, and operator identity in a tamper-evident audit trail.	—	subsystem, alarm-management, session-171
SUB-SUBSYSTEMREQUIREMENTS-019	The Display Rendering Engine SHALL render continuous ECG waveforms at a minimum refresh rate of 25 frames per second with a sweep speed selectable between 12.5 mm/s and 50 mm/s.	—	subsystem, central-monitoring-station, display, session-172
SUB-SUBSYSTEMREQUIREMENTS-020	The Display Rendering Engine SHALL update numeric vital sign readouts within 1 second of receiving new parameter values from the Patient Tile Manager.	—	subsystem, central-monitoring-station, display, session-172
SUB-SUBSYSTEMREQUIREMENTS-021	The Patient Tile Manager SHALL support simultaneous display of at least 32 patient tiles, each showing the active vital sign parameters, alarm status, and patient identifier for one monitored bed.	—	subsystem, central-monitoring-station, tile-manager, session-172
SUB-SUBSYSTEMREQUIREMENTS-022	When a patient alarm state changes, the Patient Tile Manager SHALL reorder the tile display within 2 seconds so that patients with crisis-priority alarms appear in the most prominent screen positions.	—	subsystem, central-monitoring-station, tile-manager, session-172
SUB-SUBSYSTEMREQUIREMENTS-023	The Trend Analysis Engine SHALL maintain rolling trend buffers of at least 72 hours duration for each monitored vital sign parameter per patient.	—	subsystem, central-monitoring-station, trend, session-172
SUB-SUBSYSTEMREQUIREMENTS-024	The Trend Analysis Engine SHALL detect gradual vital sign deterioration by computing a weighted early warning score at 5-minute intervals and SHALL flag patients whose score increases by 2 or more points within any 60-minute window.	—	subsystem, central-monitoring-station, trend, session-172
SUB-SUBSYSTEMREQUIREMENTS-025	The Alert Dashboard Controller SHALL provide a one-touch alarm acknowledgement control that records the acknowledging clinician identity, timestamp, and alarm identifier in the audit trail.	—	subsystem, central-monitoring-station, alert-dashboard, session-172
SUB-SUBSYSTEMREQUIREMENTS-026	When a clinician activates the alarm silence function, the Alert Dashboard Controller SHALL suppress the audible annunciator for a maximum of 120 seconds while maintaining the visual alarm indicator.	—	subsystem, central-monitoring-station, alert-dashboard, session-172
SUB-SUBSYSTEMREQUIREMENTS-027	The Multi-bed Overview Processor SHALL generate a ward-level acuity summary screen that colour-codes each bed by the highest active alarm priority and updates within 3 seconds of any alarm state change.	—	subsystem, central-monitoring-station, multi-bed, session-172
SUB-SUBSYSTEMREQUIREMENTS-028	The Multi-bed Overview Processor SHALL compute and display per-bed alarm frequency statistics over configurable time windows of 1, 4, 8, and 24 hours to support alarm burden assessment by charge nurses.	—	subsystem, central-monitoring-station, multi-bed, session-172
SUB-SUBSYSTEMREQUIREMENTS-029	The HL7/FHIR Interface Engine SHALL support bidirectional communication using HL7 v2.x messaging (ADT, ORU, ORM message types) and FHIR R4 RESTful API operations for patient, observation, and device resources.	—	subsystem, clinical-data-integration, session-173
SUB-SUBSYSTEMREQUIREMENTS-030	The HL7/FHIR Interface Engine SHALL process inbound HL7 messages and FHIR resource requests within 500 milliseconds of receipt under normal operating load.	—	subsystem, clinical-data-integration, session-173
SUB-SUBSYSTEMREQUIREMENTS-031	When an ADT Admit event is received for a bed with an active bedside monitor, the Patient ADT Manager SHALL automatically associate the patient record with the monitor within 2 seconds of event receipt.	—	subsystem, clinical-data-integration, session-173
SUB-SUBSYSTEMREQUIREMENTS-032	When an ADT Discharge event is received, the Patient ADT Manager SHALL disassociate the patient record from all bound monitors and archive the monitoring session data within 5 seconds.	—	subsystem, clinical-data-integration, session-173
SUB-SUBSYSTEMREQUIREMENTS-033	The Clinical Data Repository SHALL refresh cached patient demographics and medication data from the EHR at a configurable interval not exceeding 15 minutes and upon receipt of any ADT update event for the patient.	—	subsystem, clinical-data-integration, session-173
SUB-SUBSYSTEMREQUIREMENTS-034	The Clinical Data Repository SHALL respond to patient context queries from the Alarm Management Subsystem and Central Monitoring Station within 50 milliseconds.	—	subsystem, clinical-data-integration, session-173
SUB-SUBSYSTEMREQUIREMENTS-035	The Data Export Controller SHALL export continuous vital sign observation data to the hospital EMR in HL7 ORU message format or FHIR Observation resources at a configurable interval of 1 to 60 minutes.	—	subsystem, clinical-data-integration, session-173
SUB-SUBSYSTEMREQUIREMENTS-036	The Terminology and Coding Service SHALL map all exported vital sign measurements to their corresponding LOINC observation codes with a mapping completeness of at least 99% for standard vital signs (heart rate, SpO2, NIBP, temperature, respiratory rate).	—	subsystem, clinical-data-integration, session-173
SUB-SUBSYSTEMREQUIREMENTS-037	The Medical-Grade Network Switch SHALL forward vital sign data frames between any two ports with a maximum latency of 500 microseconds under full traffic load.	—	subsystem, network, session-174
SUB-SUBSYSTEMREQUIREMENTS-038	The Medical-Grade Network Switch SHALL provide dual redundant uplink paths with automatic failover completing within 3 seconds upon detection of link loss.	—	subsystem, network, session-174
SUB-SUBSYSTEMREQUIREMENTS-039	The Wireless Access Controller SHALL complete roaming handoff for mobile patient monitors between access points within 100 milliseconds without loss of vital sign data packets.	—	subsystem, network, session-174
SUB-SUBSYSTEMREQUIREMENTS-040	The Wireless Access Controller SHALL authenticate all wireless client devices using WPA3-Enterprise with 802.1X certificate-based authentication before granting network access.	—	subsystem, network, session-174
SUB-SUBSYSTEMREQUIREMENTS-041	The Time Synchronization Service SHALL maintain clock alignment across all connected monitoring devices to within 1 millisecond of the network master clock using IEEE 1588 Precision Time Protocol.	—	subsystem, network, session-174
SUB-SUBSYSTEMREQUIREMENTS-042	The Clinical Network Firewall SHALL enforce TLS 1.2 or higher on all data flows carrying patient health information between the monitoring VLAN and the hospital enterprise network.	—	subsystem, network, session-174
SUB-SUBSYSTEMREQUIREMENTS-043	The Clinical Network Firewall SHALL isolate the clinical monitoring network into a dedicated VLAN with access control lists permitting only authorized protocols and endpoints per IEC 80001-1.	—	subsystem, network, session-174
SUB-SUBSYSTEMREQUIREMENTS-044	The Message Broker and Data Distribution Service SHALL deliver alarm event messages to all subscribed consumers within 50 milliseconds of publication with guaranteed at-least-once delivery semantics.	—	subsystem, network, session-174
SUB-SUBSYSTEMREQUIREMENTS-045	The Message Broker and Data Distribution Service SHALL support topic-based routing with per-patient and per-parameter granularity, enabling subsystems to subscribe to specific vital sign streams without receiving unrelated traffic.	—	subsystem, network, session-174
SUB-SUBSYSTEMREQUIREMENTS-046	When the primary PTP grandmaster clock becomes unavailable, the Time Synchronization Service SHALL promote a secondary clock source and re-synchronize all devices within 10 seconds while maintaining sub-5 millisecond accuracy during the transition.	—	subsystem, network, session-174

Interface Requirements (IFC)

Ref	Requirement	V&V	Tags
IFC-INTERFACEDEFINITIONS-001	The interface between the ECG Acquisition Module and the Signal Conditioning Unit SHALL convey digitised ECG samples at 500 Hz per channel via a synchronous serial data bus with a maximum latency of 2 ms.	—	interface, vital-signs-acquisition, ecg, session-170
IFC-INTERFACEDEFINITIONS-002	The interface between the Pulse Oximetry Module and the Signal Conditioning Unit SHALL transmit red and infrared photoplethysmogram samples at a minimum rate of 100 Hz with time-stamped synchronisation to the system clock.	—	interface, vital-signs-acquisition, spo2, session-170
IFC-INTERFACEDEFINITIONS-003	The interface between the NIBP Measurement Module and the Signal Conditioning Unit SHALL report cuff pressure readings at 200 Hz during inflation and deflation, and SHALL signal measurement completion with systolic, diastolic, and MAP values.	—	interface, vital-signs-acquisition, nibp, session-170
IFC-INTERFACEDEFINITIONS-004	The interface between the Signal Conditioning Unit and the Network and Communication Subsystem SHALL output calibrated vital sign parameter packets at 1 Hz containing heart rate, SpO2, NIBP, and temperature values conforming to IEEE 11073 encoding.	—	interface, vital-signs-acquisition, network, session-170
IFC-INTERFACEDEFINITIONS-005	The interface between the Vital Signs Acquisition Subsystem and the Alarm Detection Engine SHALL deliver calibrated vital sign samples as time-stamped parameter-value pairs at the acquisition sampling rate, with parameter identity, unit of measure, and signal quality indicator.	—	interface, alarm-management, session-171
IFC-INTERFACEDEFINITIONS-006	The interface between the Alarm Detection Engine and the Alarm Prioritization Module SHALL convey alarm condition events containing the violated parameter identity, threshold value, measured value, direction of violation, and detection timestamp.	—	interface, alarm-management, session-171
IFC-INTERFACEDEFINITIONS-007	The interface between the Alarm Notification Controller and the Central Monitoring Station SHALL transmit alarm notification messages containing patient identifier, bed location, alarm priority, parameter identity, and current value using a reliable transport with delivery confirmation.	—	interface, alarm-management, session-171
IFC-INTERFACEDEFINITIONS-008	The interface between the Alarm Notification Controller and the nurse call system SHALL conform to the facility nurse call protocol and transmit crisis and warning alarms with bed location and alarm type within 3 seconds of alarm activation.	—	interface, alarm-management, session-171
IFC-INTERFACEDEFINITIONS-009	The interface between the Alarm Management Subsystem and the Alert Dashboard Controller SHALL deliver alarm events via an asynchronous message queue with guaranteed delivery, conveying alarm identifier, priority level, parameter name, threshold value, measured value, and patient identifier within 500 milliseconds of alarm activation.	—	interface, central-monitoring-station, session-172
IFC-INTERFACEDEFINITIONS-010	The interface between the Vital Signs Acquisition Subsystem and the Patient Tile Manager SHALL stream digitised vital sign samples via a publish-subscribe transport, with each message containing the patient identifier, parameter type, sample value, and acquisition timestamp, at a rate matching the source sampling frequency.	—	interface, central-monitoring-station, session-172
IFC-INTERFACEDEFINITIONS-011	The interface between the Alert Dashboard Controller and the Alarm Management Subsystem SHALL convey clinician alarm acknowledgement and silence commands, including the operator identity, action type, and alarm identifier, with a round-trip confirmation latency of no more than 1 second.	—	interface, central-monitoring-station, session-172
IFC-INTERFACEDEFINITIONS-012	The interface between the HL7/FHIR Interface Engine and the Clinical Data Repository SHALL transfer patient demographic, medication, and allergy data using an internal normalized patient context schema, with each update carrying a timestamp and source EHR system identifier.	—	interface, clinical-data-integration, session-173
IFC-INTERFACEDEFINITIONS-013	The interface between the Clinical Data Repository and the Alarm Prioritization Module SHALL provide patient clinical context (active medications, known conditions) within 50 milliseconds upon query to support context-aware alarm priority adjustment.	—	interface, clinical-data-integration, session-173
IFC-INTERFACEDEFINITIONS-014	The interface between the Data Export Controller and the Network and Communication Subsystem SHALL support TLS 1.2 or higher encrypted transport for all outbound clinical data exports, with mutual certificate authentication to the receiving EMR endpoint.	—	interface, clinical-data-integration, session-173
IFC-INTERFACEDEFINITIONS-015	The interface between the Medical-Grade Network Switch and Wireless Access Controller SHALL use IEEE 802.1Q tagged VLAN trunks with dedicated VLAN IDs for clinical monitoring traffic and management traffic.	—	interface, network, session-174
IFC-INTERFACEDEFINITIONS-016	The interface between the Medical-Grade Network Switch and Clinical Network Firewall SHALL carry all inter-VLAN traffic through a trunk port supporting IEEE 802.1Q at a minimum bandwidth of 10 Gbps.	—	interface, network, session-174
IFC-INTERFACEDEFINITIONS-017	The interface between the Message Broker and Data Distribution Service and subscribing subsystems SHALL use a publish-subscribe protocol with topic hierarchies structured as patient/parameter/event-type, with message payloads conforming to a common JSON schema.	—	interface, network, session-174
IFC-INTERFACEDEFINITIONS-018	The interface between the Time Synchronization Service and bedside monitoring devices SHALL use IEEE 1588 PTPv2 messages over multicast UDP, with the grandmaster announcing at a minimum rate of 1 message per second.	—	interface, network, session-174

Verification Plan (VER)

Ref	Requirement	V&V	Tags
VER-VERIFICATIONMETHODS-001	The threshold evaluation latency of the Alarm Detection Engine SHALL be verified by test, injecting vital sign samples at maximum acquisition rate and measuring the time from sample receipt to alarm condition event generation, confirming it does not exceed 500 milliseconds across 10000 consecutive samples.	—	verification, alarm-management, session-171
VER-VERIFICATIONMETHODS-002	The IEC 60601-1-8 priority classification of the Alarm Prioritization Module SHALL be verified by inspection of the alarm priority mapping table and by test using a predefined set of alarm conditions covering all three priority levels, confirming correct classification for each.	—	verification, alarm-management, session-171
VER-VERIFICATIONMETHODS-003	The crisis alarm bypass behaviour of the Alarm Fatigue Mitigation Unit SHALL be verified by test, configuring maximum delay and suppression settings and then injecting a crisis-priority alarm, confirming the alarm passes to the Notification Controller with zero delay.	—	verification, alarm-management, session-171
VER-VERIFICATIONMETHODS-004	The tamper-evident audit trail of the Alarm History and Audit Logger SHALL be verified by test, generating a sequence of alarm events across all lifecycle states and confirming that every event is recorded with correct timestamp, patient identifier, and operator identity, and that any post-hoc modification is detectable.	—	verification, alarm-management, session-171
VER-VERIFICATIONMETHODS-005	The automatic patient-monitor binding upon ADT Admit of the Patient ADT Manager SHALL be verified by integration test using a simulated HL7 ADT^A01 message sequence, measuring the time from message receipt to confirmed binding in the Clinical Data Repository, with pass criteria of binding completion within 2 seconds for 100 consecutive admit events.	—	verification, clinical-data-integration, session-173
VER-VERIFICATIONMETHODS-006	The LOINC mapping completeness of the Terminology and Coding Service SHALL be verified by inspection of the terminology mapping table against the full set of vital sign measurement types produced by the Vital Signs Acquisition Subsystem, with pass criteria of a valid LOINC code assigned to at least 99% of standard measurement types.	—	verification, clinical-data-integration, session-173
VER-VERIFICATIONMETHODS-007	The TLS encryption and mutual certificate authentication of the Data Export Controller interface SHALL be verified by penetration test capturing outbound traffic during clinical data export, confirming TLS 1.2 or higher negotiation and mutual certificate exchange, with pass criteria of zero plaintext observation data detected in captured traffic.	—	verification, clinical-data-integration, session-173
VER-VERIFICATIONMETHODS-008	Verification of network switch latency SHALL be performed by injecting timestamped test frames at line rate across all active ports and measuring one-way delay using hardware timestamping, confirming 99th percentile latency remains below 500 microseconds.	—	verification, network, session-174
VER-VERIFICATIONMETHODS-009	Verification of network failover SHALL be performed by physically disconnecting the primary uplink during active vital sign streaming and measuring the interval until data delivery resumes on the redundant path, confirming completion within 3 seconds with zero alarm message loss.	—	verification, network, session-174
VER-VERIFICATIONMETHODS-010	Verification of wireless roaming handoff SHALL be performed by moving a mobile patient monitor through coverage overlap zones at walking speed while streaming continuous vital signs, confirming no data gap exceeds 100 milliseconds via packet capture analysis.	—	verification, network, session-174
VER-VERIFICATIONMETHODS-011	The ECG signal bandwidth and sampling rate of the ECG Acquisition Module SHALL be verified by test, applying calibrated sine wave signals at 0.05 Hz, 40 Hz, and 150 Hz through a patient simulator and measuring the digitised output amplitude, confirming frequency response within +/- 3 dB across the specified bandwidth and sampling rate of at least 500 Hz.	—	verification, vital-signs-acquisition, session-175
VER-VERIFICATIONMETHODS-012	The ECG signal bandwidth and sampling rate of the ECG Acquisition Module SHALL be verified by test, applying calibrated sine wave signals at 0.05 Hz, 40 Hz, and 150 Hz through a patient simulator and measuring the digitised output amplitude, confirming frequency response within plus or minus 3 dB across the specified bandwidth and sampling rate of at least 500 Hz.	—	verification, vital-signs-acquisition, session-175
VER-VERIFICATIONMETHODS-013	The arterial oxygen saturation accuracy of the Pulse Oximetry Module SHALL be verified by test using a multi-wavelength pulse oximeter tester simulating SpO2 levels at 70%, 80%, 90%, 95%, and 100%, confirming readings within 2 percentage points of the reference value and pulse rate accuracy within 3 bpm across the physiological range of 30 to 240 bpm.	—	verification, vital-signs-acquisition, session-175
VER-VERIFICATIONMETHODS-014	The NIBP measurement accuracy and cuff safety limits of the NIBP Measurement Module SHALL be verified by test using a calibrated pressure source and adult arm simulator, confirming systolic and diastolic accuracy within 5 mmHg for mean arterial pressures of 60 to 200 mmHg, and verifying that cuff pressure never exceeds 300 mmHg and automatic deflation engages within 120 seconds.	—	verification, vital-signs-acquisition, session-175
VER-VERIFICATIONMETHODS-015	The mains interference rejection of the Signal Conditioning Unit SHALL be verified by test, superimposing 50 Hz and 60 Hz sinusoidal signals at 1 mV peak-to-peak on a calibrated ECG reference signal and measuring residual mains frequency content at the output, confirming attenuation of at least 40 dB for both frequencies across all sensor input channels.	—	verification, vital-signs-acquisition, session-175
VER-VERIFICATIONMETHODS-016	The waveform rendering performance of the Display Rendering Engine SHALL be verified by test, streaming continuous ECG waveforms to the display while measuring frame update rate and numeric vital sign update latency, confirming the waveform refresh rate meets or exceeds 25 frames per second and numeric readout updates complete within 1 second of source data change.	—	verification, central-monitoring-station, session-175
VER-VERIFICATIONMETHODS-017	The patient tile capacity and alarm-driven reordering of the Patient Tile Manager SHALL be verified by test, configuring 32 simultaneous patient streams and triggering alarm state transitions on selected patients, confirming all 32 tiles render correctly and that alarm-priority reordering completes within 2 seconds of alarm state change.	—	verification, central-monitoring-station, session-175
VER-VERIFICATIONMETHODS-018	The trend analysis buffer retention and deterioration detection of the Trend Analysis Engine SHALL be verified by test, injecting 72 hours of simulated vital sign data with a programmed gradual deterioration pattern, confirming trend buffer retention of the full 72-hour window and detection of the deterioration trend within 15 minutes of onset by comparison against the embedded early warning scoring algorithm.	—	verification, central-monitoring-station, session-175
VER-VERIFICATIONMETHODS-019	The multi-bed overview capacity of the Multi-bed Overview Processor SHALL be verified by test, simulating a full ward of 32 patients with concurrent vital sign streams, alarm conditions, and demographic data updates, confirming that the consolidated overview refreshes within 3 seconds and correctly reflects the alarm status, bed assignment, and latest vitals for every active patient.	—	verification, central-monitoring-station, session-175

Internal Diagrams

flowchart TB
  n0["component<br>ECG Acquisition Module"]
  n1["component<br>Pulse Oximetry Module"]
  n2["component<br>NIBP Measurement Module"]
  n3["component<br>Temperature Measurement Module"]
  n4["component<br>Signal Conditioning Unit"]
  n0 -->|Raw ECG waveform| n4
  n1 -->|PPG signal| n4
  n2 -->|Cuff pressure data| n4
  n3 -->|Thermistor resistance| n4

Vital Signs Acquisition Subsystem — Internal

flowchart TB
  n0["component<br>Alarm Detection Engine"]
  n1["component<br>Alarm Prioritization Module"]
  n2["component<br>Alarm Fatigue Mitigation Unit"]
  n3["component<br>Alarm Notification Controller"]
  n4["component<br>Alarm History and Audit Logger"]
  n5["component<br>Alarm Detection Engine"]
  n6["component<br>Alarm Prioritization Module"]
  n7["component<br>Alarm Fatigue Mitigation Unit"]
  n8["component<br>Alarm Notification Controller"]
  n9["component<br>Alarm History and Audit Logger"]
  n10["external<br>Vital Signs Acquisition"]
  n11["external<br>Central Monitoring Station"]
  n10 -->|vital sign data streams| n5
  n5 -->|alarm condition events| n6
  n6 -->|prioritized alarms| n7
  n7 -->|filtered alarm stream| n8
  n8 -->|alarm notifications| n11
  n5 -->|raw alarm events| n9
  n8 -->|notification delivery status| n9

Alarm Management Subsystem — Internal

flowchart TB
  n0["component<br>Display Rendering Engine"]
  n1["component<br>Patient Tile Manager"]
  n2["component<br>Trend Analysis Engine"]
  n3["component<br>Alert Dashboard Controller"]
  n4["component<br>Multi-bed Overview Processor"]
  n1 -->|tile content| n0
  n2 -->|trend graphs| n0
  n3 -->|alarm status overlay| n1
  n4 -->|bed priority ranking| n1
  n2 -->|deterioration signals| n4

Central Monitoring Station — Internal

flowchart TB
  n0["component<br>HL7/FHIR Interface Engine"]
  n1["component<br>Patient ADT Manager"]
  n2["component<br>Clinical Data Repository"]
  n3["component<br>Data Export Controller"]
  n4["component<br>Terminology and Coding Service"]
  n0 -->|Patient context from EHR| n2
  n0 -->|ADT events| n1
  n1 -->|Patient-device bindings| n2
  n2 -->|Clinical data for export| n3
  n4 -->|Standardized codes| n3
  n4 -->|Terminology mappings| n0

Clinical Data Integration Subsystem — Internal

flowchart TB
  n0["component<br>Medical-Grade Network Switch"]
  n1["component<br>Wireless Access Controller"]
  n2["component<br>Time Synchronization Service"]
  n3["component<br>Clinical Network Firewall"]
  n4["component<br>Message Broker and Data Distribution Service"]
  n0 -->|VLAN trunks| n1
  n0 -->|Ingress/egress traffic| n3
  n2 -->|PTP sync| n0
  n4 -->|Pub/sub streams| n0
  n3 -->|Security policies| n1

Network and Communication Subsystem — Internal

Classified Entities

Entity	Hex Code	Description
Alarm Detection Engine	41F77B19	Software component within a hospital patient monitoring alarm management subsystem that continuously evaluates incoming vital sign data streams against configurable clinical thresholds and rule-based alarm conditions to detect clinically significant deviations
Alarm Fatigue Mitigation Unit	41B77B19	Software component within a hospital alarm management subsystem that implements intelligent alarm delay, suppression of non-actionable alarms, and escalation logic to reduce clinician alarm fatigue while preserving patient safety
Alarm History and Audit Logger	40853359	Software component within a hospital alarm management subsystem that records all alarm events, clinician responses, silencing actions, and escalation steps into a tamper-evident audit log for clinical review, regulatory compliance, and alarm system performance analysis
Alarm Management Subsystem	51F77B19	Intelligent alarm processing engine that applies clinical decision rules to vital sign data streams, manages alarm thresholds, suppresses nuisance alarms through delay and correlation logic, prioritizes alarm severity, and routes notifications to appropriate clinical staff via bedside annunciators, central station, and mobile devices.
Alarm Notification Controller	55FD7A18	Hardware/software controller within a hospital alarm management subsystem that manages the distribution of alarm signals through audible annunciators, visual indicators at bedside, and remote notification to nurse call systems and mobile devices
Alarm Prioritization Module	41B77959	Software module within a hospital alarm management subsystem that classifies detected alarm conditions into severity levels (crisis, warning, advisory) according to IEC 60601-1-8 priority categories and clinical context
Alert Dashboard Controller	50BD7B18	User-interface controller within a hospital central monitoring station that manages alarm status displays and clinician interaction. Provides alarm acknowledgement controls, alarm silence functions, escalation timers, and alarm history views. Interfaces with the Alarm Management Subsystem to receive alarm events and relay clinician responses.
Central Monitoring Station	54ED5218	Nursing station workstation that aggregates and displays real-time vital signs from all bedside monitors in a ward or unit. Provides multi-patient overview, waveform display, trend charting, and alarm summary dashboard for clinical staff.
Clinical Data Integration Subsystem	40B57359	Middleware and data services layer that stores patient monitoring data, performs trend analysis and clinical analytics, and integrates with hospital information systems via HL7 FHIR and ADT interfaces. Manages patient context (admit/discharge/transfer), maps bedside monitors to patient records, and exports data to the Electronic Health Record.
Clinical Data Repository	40851119	Local data store within a hospital patient monitoring system that caches patient demographics, active medication lists, allergy information, and clinical context received from the EHR. Provides low-latency access to patient context for alarm management and display subsystems.
Clinical Network Firewall	50A53859	Network security appliance enforcing segmentation between the clinical monitoring VLAN, hospital enterprise network, and external interfaces. Implements deep packet inspection, intrusion detection, and access control lists to protect patient monitoring data flows per IEC 80001-1 medical network risk management requirements.
Data Export Controller	40F77B19	Software component within a hospital patient monitoring system that manages outbound data flows to external systems including EMR archival, clinical analytics platforms, and regulatory reporting. Handles batch and streaming export modes with configurable data retention policies.
Display Rendering Engine	54F57319	Real-time waveform and numeric vital sign rendering engine within a hospital central monitoring station. Processes streaming ECG, SpO2, and NIBP data to render continuous waveforms, numeric readouts, and colour-coded alarm states on large-format displays at the nursing station.
ECG Acquisition Module	D4E55019	Bedside patient monitoring component that acquires cardiac electrical activity via surface electrodes, amplifies the biopotential signal, and digitises it for waveform display and arrhythmia analysis
HL7/FHIR Interface Engine	51F77959	Protocol translation engine within a hospital patient monitoring system that handles bidirectional HL7 v2 messaging and FHIR R4 REST API calls for interoperability with Electronic Health Record systems. Converts internal monitoring data formats to standard healthcare interoperability formats and vice versa.
Hospital Patient Monitoring System	55FF7319	An integrated clinical monitoring system deployed in hospital wards to continuously track patient vital signs including heart rate, blood pressure, SpO2, respiration rate, and temperature, providing real-time alarming, trend analysis, and integration with electronic health records
Medical-Grade Network Switch	D2A51018	Layer 2/3 managed Ethernet switch providing deterministic low-latency connectivity between bedside monitors, central stations, and clinical data systems within the hospital patient monitoring network. Supports VLAN segmentation and Quality of Service prioritization for real-time vital sign traffic.
Message Broker and Data Distribution Service	40F57319	Publish-subscribe middleware layer distributing real-time vital sign streams, alarm events, and patient context updates between bedside monitors, central monitoring stations, alarm management, and clinical data integration subsystems. Provides guaranteed message delivery, topic-based routing, and configurable quality-of-service levels for different data criticality tiers.
Multi-bed Overview Processor	50F77319	Aggregation processor within a hospital central monitoring station that synthesises ward-level situational awareness from individual patient data streams. Generates multi-bed overview screens showing the acuity status of all monitored beds, highlights deteriorating patients, and computes ward-level statistics such as alarm frequency and staff response times.
Network and Communication Subsystem	50A57019	Hospital-grade wired and wireless network infrastructure connecting bedside monitors to central stations and clinical data servers. Includes medical-grade Wi-Fi access points, Ethernet switches with VLAN isolation for clinical traffic, network redundancy with automatic failover, and secure communication protocols ensuring data integrity and low-latency transmission of waveform and alarm data.
NIBP Measurement Module	D6DD3018	Non-invasive blood pressure measurement component using an inflatable cuff, motorised pump, bleed valve, and pressure transducer to perform oscillometric blood pressure determination
Patient ADT Manager	41B73B18	Software component within a hospital patient monitoring system that processes Admit, Discharge, and Transfer events from the hospital information system. Automatically binds bedside monitors to patient records upon admission and unbinds on discharge or transfer.
Patient Tile Manager	40B53118	Software component within a hospital central monitoring station that manages per-patient display tiles. Each tile aggregates the vital signs, alarm status, and patient demographics for one bed. Handles tile layout, assignment of beds to screen positions, and tile priority based on alarm severity.
Pulse Oximetry Module	D4CC3018	Non-invasive optical sensor module using red and infrared LEDs with a photodetector to measure arterial blood oxygen saturation (SpO2) and pulse rate via photoplethysmography
Signal Conditioning Unit	50F53018	Embedded processing unit within the bedside monitor that receives raw analog and digital signals from all sensor modules, applies filtering, noise rejection, and digital signal processing to produce calibrated vital sign parameters
Temperature Measurement Module	D48D1218	Patient body temperature measurement component using a thermistor probe to acquire continuous or spot-check temperature readings for clinical monitoring
Terminology and Coding Service	50A5F158	Software component within a hospital patient monitoring system that maps internal measurement identifiers and alarm codes to standard medical terminologies including LOINC observation codes, SNOMED CT clinical terms, and ICD-10 diagnostic codes for semantic interoperability.
Time Synchronization Service	40A57B58	Precision time protocol (PTP/IEEE 1588) and NTP service providing sub-millisecond time alignment across all bedside monitors, central stations, and data repositories in the hospital patient monitoring system. Ensures temporal coherence of vital sign samples, alarm timestamps, and audit records.
Trend Analysis Engine	50F73319	Data processing engine within a hospital central monitoring station that computes, stores, and displays historical vital sign trends. Maintains rolling 72-hour trend buffers per patient parameter, calculates statistical summaries, and detects gradual clinical deterioration patterns that may not trigger threshold alarms.
Vital Signs Acquisition Subsystem	D4E55219	Bedside sensor array and signal conditioning hardware that captures patient vital signs including ECG waveforms, pulse oximetry (SpO2), non-invasive blood pressure (NIBP), respiration rate via impedance pneumography, and core body temperature. Includes analog front-ends, ADCs, and local signal preprocessing.
Wireless Access Controller	51B77018	Centralized wireless LAN controller managing clinical-grade Wi-Fi access points throughout the patient care area. Provides seamless roaming for mobile patient monitors and handheld devices, enforcing WPA3-Enterprise authentication and maintaining sub-100ms handoff latency for continuous vital sign telemetry.

Decomposition Relationships

Part-Of

Component	Belongs To
Vital Signs Acquisition Subsystem	Hospital Patient Monitoring System
Central Monitoring Station	Hospital Patient Monitoring System
Alarm Management Subsystem	Hospital Patient Monitoring System
Clinical Data Integration Subsystem	Hospital Patient Monitoring System
Network and Communication Subsystem	Hospital Patient Monitoring System
ECG Acquisition Module	Vital Signs Acquisition Subsystem
Pulse Oximetry Module	Vital Signs Acquisition Subsystem
NIBP Measurement Module	Vital Signs Acquisition Subsystem
Temperature Measurement Module	Vital Signs Acquisition Subsystem
Signal Conditioning Unit	Vital Signs Acquisition Subsystem
Alarm Detection Engine	Alarm Management Subsystem
Alarm Prioritization Module	Alarm Management Subsystem
Alarm Notification Controller	Alarm Management Subsystem
Alarm Fatigue Mitigation Unit	Alarm Management Subsystem
Alarm History and Audit Logger	Alarm Management Subsystem
Display Rendering Engine	Central Monitoring Station
Patient Tile Manager	Central Monitoring Station
Trend Analysis Engine	Central Monitoring Station
Alert Dashboard Controller	Central Monitoring Station
Multi-bed Overview Processor	Central Monitoring Station
HL7/FHIR Interface Engine	Clinical Data Integration Subsystem
Patient ADT Manager	Clinical Data Integration Subsystem
Clinical Data Repository	Clinical Data Integration Subsystem
Data Export Controller	Clinical Data Integration Subsystem
Terminology and Coding Service	Clinical Data Integration Subsystem
Medical-Grade Network Switch	Network and Communication Subsystem
Wireless Access Controller	Network and Communication Subsystem
Time Synchronization Service	Network and Communication Subsystem
Clinical Network Firewall	Network and Communication Subsystem
Message Broker and Data Distribution Service	Network and Communication Subsystem

Connections

From	To
ECG Acquisition Module	Signal Conditioning Unit
Pulse Oximetry Module	Signal Conditioning Unit
NIBP Measurement Module	Signal Conditioning Unit
Temperature Measurement Module	Signal Conditioning Unit
Alarm Detection Engine	Alarm Prioritization Module
Alarm Prioritization Module	Alarm Fatigue Mitigation Unit
Alarm Fatigue Mitigation Unit	Alarm Notification Controller
Alarm Notification Controller	Alarm History and Audit Logger
Alarm Detection Engine	Alarm History and Audit Logger
Patient Tile Manager	Display Rendering Engine
Trend Analysis Engine	Display Rendering Engine
Alert Dashboard Controller	Patient Tile Manager
Multi-bed Overview Processor	Patient Tile Manager
HL7/FHIR Interface Engine	Clinical Data Repository
Clinical Data Repository	Alarm Prioritization Module
Data Export Controller	Network and Communication Subsystem
Medical-Grade Network Switch	Wireless Access Controller
Medical-Grade Network Switch	Clinical Network Firewall
Message Broker and Data Distribution Service	Medical-Grade Network Switch
Time Synchronization Service	Medical-Grade Network Switch

Produces

Component	Output
ECG Acquisition Module	raw ECG waveform data
Pulse Oximetry Module	photoplethysmogram and SpO2 values
NIBP Measurement Module	systolic, diastolic, and mean arterial pressure
Temperature Measurement Module	calibrated body temperature readings
Signal Conditioning Unit	calibrated vital sign parameters
Alarm Detection Engine	alarm condition events with parameter identity and threshold delta
Alarm Prioritization Module	priority-classified alarm records with severity level and clinical context
Alarm Notification Controller	audible, visual, and remote alarm notifications
Alarm Fatigue Mitigation Unit	filtered alarm stream with suppressed non-actionable alarms
Alarm History and Audit Logger	tamper-evident alarm audit trail and performance analytics
Display Rendering Engine	rendered waveform and numeric vital sign displays
Patient Tile Manager	per-patient display tiles with aggregated vital signs and alarm status
Trend Analysis Engine	72-hour vital sign trend graphs and deterioration alerts
Alert Dashboard Controller	alarm acknowledgement commands and alarm status views
Multi-bed Overview Processor	ward-level acuity overview and patient prioritisation displays
HL7/FHIR Interface Engine	HL7 v2 messages and FHIR R4 resources
Patient ADT Manager	patient-device association records
Clinical Data Repository	cached patient clinical context
Data Export Controller	formatted clinical data exports
Terminology and Coding Service	standardized medical terminology codes
Medical-Grade Network Switch	deterministic Ethernet frames
Wireless Access Controller	authenticated wireless sessions
Time Synchronization Service	synchronized clock references
Clinical Network Firewall	filtered and inspected traffic
Message Broker and Data Distribution Service	routed vital sign and alarm streams

Traceability Matrix — Derivation

Source	Target	Type
SYS-SYSTEM-LEVELREQUIREMENTS-005	IFC-INTERFACEDEFINITIONS-018	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	IFC-INTERFACEDEFINITIONS-017	derives
SYS-SYSTEM-LEVELREQUIREMENTS-009	IFC-INTERFACEDEFINITIONS-016	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	IFC-INTERFACEDEFINITIONS-015	derives
SYS-SYSTEM-LEVELREQUIREMENTS-009	IFC-INTERFACEDEFINITIONS-014	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	IFC-INTERFACEDEFINITIONS-013	derives
SYS-SYSTEM-LEVELREQUIREMENTS-006	IFC-INTERFACEDEFINITIONS-012	derives
SYS-SYSTEM-LEVELREQUIREMENTS-008	IFC-INTERFACEDEFINITIONS-011	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	IFC-INTERFACEDEFINITIONS-010	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	IFC-INTERFACEDEFINITIONS-009	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	IFC-INTERFACEDEFINITIONS-008	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	IFC-INTERFACEDEFINITIONS-007	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	IFC-INTERFACEDEFINITIONS-006	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	IFC-INTERFACEDEFINITIONS-005	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	IFC-INTERFACEDEFINITIONS-004	derives
SYS-SYSTEM-LEVELREQUIREMENTS-003	IFC-INTERFACEDEFINITIONS-003	derives
SYS-SYSTEM-LEVELREQUIREMENTS-002	IFC-INTERFACEDEFINITIONS-002	derives
SYS-SYSTEM-LEVELREQUIREMENTS-001	IFC-INTERFACEDEFINITIONS-001	derives
SYS-SYSTEM-LEVELREQUIREMENTS-010	SUB-SUBSYSTEMREQUIREMENTS-046	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	SUB-SUBSYSTEMREQUIREMENTS-045	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	SUB-SUBSYSTEMREQUIREMENTS-044	derives
SYS-SYSTEM-LEVELREQUIREMENTS-009	SUB-SUBSYSTEMREQUIREMENTS-043	derives
SYS-SYSTEM-LEVELREQUIREMENTS-009	SUB-SUBSYSTEMREQUIREMENTS-042	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	SUB-SUBSYSTEMREQUIREMENTS-041	derives
SYS-SYSTEM-LEVELREQUIREMENTS-009	SUB-SUBSYSTEMREQUIREMENTS-040	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	SUB-SUBSYSTEMREQUIREMENTS-039	derives
SYS-SYSTEM-LEVELREQUIREMENTS-010	SUB-SUBSYSTEMREQUIREMENTS-038	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	SUB-SUBSYSTEMREQUIREMENTS-037	derives
SYS-SYSTEM-LEVELREQUIREMENTS-006	SUB-SUBSYSTEMREQUIREMENTS-036	derives
SYS-SYSTEM-LEVELREQUIREMENTS-006	SUB-SUBSYSTEMREQUIREMENTS-035	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	SUB-SUBSYSTEMREQUIREMENTS-034	derives
SYS-SYSTEM-LEVELREQUIREMENTS-011	SUB-SUBSYSTEMREQUIREMENTS-033	derives
SYS-SYSTEM-LEVELREQUIREMENTS-007	SUB-SUBSYSTEMREQUIREMENTS-032	derives
SYS-SYSTEM-LEVELREQUIREMENTS-007	SUB-SUBSYSTEMREQUIREMENTS-031	derives
SYS-SYSTEM-LEVELREQUIREMENTS-006	SUB-SUBSYSTEMREQUIREMENTS-030	derives
SYS-SYSTEM-LEVELREQUIREMENTS-006	SUB-SUBSYSTEMREQUIREMENTS-029	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-028	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-027	derives
SYS-SYSTEM-LEVELREQUIREMENTS-008	SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-026	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-025	derives
SYS-SYSTEM-LEVELREQUIREMENTS-011	SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-024	derives
SYS-SYSTEM-LEVELREQUIREMENTS-011	SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-023	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-022	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-021	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-020	derives
SYS-SYSTEM-LEVELREQUIREMENTS-005	SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-019	derives
SYS-SYSTEM-LEVELREQUIREMENTS-011	SUB-SUBSYSTEMREQUIREMENTS-018	derives
SYS-SYSTEM-LEVELREQUIREMENTS-012	SUB-SUBSYSTEMREQUIREMENTS-018	derives
SYS-SYSTEM-LEVELREQUIREMENTS-012	SUB-SUBSYSTEMREQUIREMENTS-014	derives
SYS-SYSTEM-LEVELREQUIREMENTS-012	SUB-SUBSYSTEMREQUIREMENTS-011	derives
SYS-SYSTEM-LEVELREQUIREMENTS-008	SUB-SUBSYSTEMREQUIREMENTS-014	derives
SYS-SYSTEM-LEVELREQUIREMENTS-008	SUB-SUBSYSTEMREQUIREMENTS-013	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	SUB-SUBSYSTEMREQUIREMENTS-015	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	SUB-SUBSYSTEMREQUIREMENTS-011	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	SUB-SUBSYSTEMREQUIREMENTS-010	derives
SYS-SYSTEM-LEVELREQUIREMENTS-004	SUB-SUBSYSTEMREQUIREMENTS-009	derives
SYS-SYSTEM-LEVELREQUIREMENTS-010	SUB-SUBSYSTEMREQUIREMENTS-008	derives
SYS-SYSTEM-LEVELREQUIREMENTS-012	SUB-SUBSYSTEMREQUIREMENTS-007	derives
SYS-SYSTEM-LEVELREQUIREMENTS-012	SUB-SUBSYSTEMREQUIREMENTS-006	derives
SYS-SYSTEM-LEVELREQUIREMENTS-003	SUB-SUBSYSTEMREQUIREMENTS-005	derives
SYS-SYSTEM-LEVELREQUIREMENTS-002	SUB-SUBSYSTEMREQUIREMENTS-004	derives
SYS-SYSTEM-LEVELREQUIREMENTS-002	SUB-SUBSYSTEMREQUIREMENTS-003	derives
SYS-SYSTEM-LEVELREQUIREMENTS-001	SUB-SUBSYSTEMREQUIREMENTS-002	derives
SYS-SYSTEM-LEVELREQUIREMENTS-001	SUB-SUBSYSTEMREQUIREMENTS-001	derives
STK-STAKEHOLDERNEEDS-006	SYS-SYSTEM-LEVELREQUIREMENTS-009	derives
STK-STAKEHOLDERNEEDS-005	SYS-SYSTEM-LEVELREQUIREMENTS-008	derives
STK-STAKEHOLDERNEEDS-004	SYS-SYSTEM-LEVELREQUIREMENTS-012	derives
STK-STAKEHOLDERNEEDS-003	SYS-SYSTEM-LEVELREQUIREMENTS-011	derives
STK-STAKEHOLDERNEEDS-003	SYS-SYSTEM-LEVELREQUIREMENTS-007	derives
STK-STAKEHOLDERNEEDS-003	SYS-SYSTEM-LEVELREQUIREMENTS-006	derives
STK-STAKEHOLDERNEEDS-002	SYS-SYSTEM-LEVELREQUIREMENTS-005	derives
STK-STAKEHOLDERNEEDS-002	SYS-SYSTEM-LEVELREQUIREMENTS-004	derives
STK-STAKEHOLDERNEEDS-001	SYS-SYSTEM-LEVELREQUIREMENTS-010	derives
STK-STAKEHOLDERNEEDS-001	SYS-SYSTEM-LEVELREQUIREMENTS-003	derives
STK-STAKEHOLDERNEEDS-001	SYS-SYSTEM-LEVELREQUIREMENTS-002	derives
STK-STAKEHOLDERNEEDS-001	SYS-SYSTEM-LEVELREQUIREMENTS-001	derives

Traceability Matrix — Verification

Requirement	Verified By	Type
IFC-INTERFACEDEFINITIONS-014	VER-VERIFICATIONMETHODS-007	verifies
IFC-INTERFACEDEFINITIONS-005	VER-VERIFICATIONMETHODS-001	verifies
SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-028	VER-VERIFICATIONMETHODS-019	verifies
SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-027	VER-VERIFICATIONMETHODS-019	verifies
SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-024	VER-VERIFICATIONMETHODS-018	verifies
SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-023	VER-VERIFICATIONMETHODS-018	verifies
SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-022	VER-VERIFICATIONMETHODS-017	verifies
SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-021	VER-VERIFICATIONMETHODS-017	verifies
SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-020	VER-VERIFICATIONMETHODS-016	verifies
SUB-CENTRALMONITORINGSTATIONREQUIREMENTS-019	VER-VERIFICATIONMETHODS-016	verifies
SUB-SUBSYSTEMREQUIREMENTS-007	VER-VERIFICATIONMETHODS-015	verifies
SUB-SUBSYSTEMREQUIREMENTS-006	VER-VERIFICATIONMETHODS-014	verifies
SUB-SUBSYSTEMREQUIREMENTS-005	VER-VERIFICATIONMETHODS-014	verifies
SUB-SUBSYSTEMREQUIREMENTS-004	VER-VERIFICATIONMETHODS-013	verifies
SUB-SUBSYSTEMREQUIREMENTS-003	VER-VERIFICATIONMETHODS-013	verifies
SUB-SUBSYSTEMREQUIREMENTS-002	VER-VERIFICATIONMETHODS-012	verifies
SUB-SUBSYSTEMREQUIREMENTS-001	VER-VERIFICATIONMETHODS-012	verifies
SUB-SUBSYSTEMREQUIREMENTS-039	VER-VERIFICATIONMETHODS-010	verifies
SUB-SUBSYSTEMREQUIREMENTS-038	VER-VERIFICATIONMETHODS-009	verifies
SUB-SUBSYSTEMREQUIREMENTS-037	VER-VERIFICATIONMETHODS-008	verifies
SUB-SUBSYSTEMREQUIREMENTS-036	VER-VERIFICATIONMETHODS-006	verifies
SUB-SUBSYSTEMREQUIREMENTS-031	VER-VERIFICATIONMETHODS-005	verifies
SUB-SUBSYSTEMREQUIREMENTS-018	VER-VERIFICATIONMETHODS-004	verifies
SUB-SUBSYSTEMREQUIREMENTS-014	VER-VERIFICATIONMETHODS-003	verifies
SUB-SUBSYSTEMREQUIREMENTS-011	VER-VERIFICATIONMETHODS-002	verifies
SUB-SUBSYSTEMREQUIREMENTS-009	VER-VERIFICATIONMETHODS-001	verifies

Orphan Requirements (no trace links)

Ref	Document	Requirement
SUB-SUBSYSTEMREQUIREMENTS-012	subsystem-requirements	When a patient record indicates a known pre-existing condition for a monitored parameter, the Alarm Prioritization Modul...
SUB-SUBSYSTEMREQUIREMENTS-016	subsystem-requirements	The Alarm Notification Controller SHALL transmit crisis and warning alarms to the nurse call system and designated mobil...
SUB-SUBSYSTEMREQUIREMENTS-017	subsystem-requirements	When a crisis alarm remains unacknowledged for a configurable escalation period (default 120 seconds), the Alarm Notific...
SUB-SUBSYSTEMREQUIREMENTS-019	subsystem-requirements	The Display Rendering Engine SHALL render continuous ECG waveforms at a minimum refresh rate of 25 frames per second wit...
SUB-SUBSYSTEMREQUIREMENTS-020	subsystem-requirements	The Display Rendering Engine SHALL update numeric vital sign readouts within 1 second of receiving new parameter values ...
SUB-SUBSYSTEMREQUIREMENTS-021	subsystem-requirements	The Patient Tile Manager SHALL support simultaneous display of at least 32 patient tiles, each showing the active vital ...
SUB-SUBSYSTEMREQUIREMENTS-022	subsystem-requirements	When a patient alarm state changes, the Patient Tile Manager SHALL reorder the tile display within 2 seconds so that pat...
SUB-SUBSYSTEMREQUIREMENTS-023	subsystem-requirements	The Trend Analysis Engine SHALL maintain rolling trend buffers of at least 72 hours duration for each monitored vital si...
SUB-SUBSYSTEMREQUIREMENTS-024	subsystem-requirements	The Trend Analysis Engine SHALL detect gradual vital sign deterioration by computing a weighted early warning score at 5...
SUB-SUBSYSTEMREQUIREMENTS-025	subsystem-requirements	The Alert Dashboard Controller SHALL provide a one-touch alarm acknowledgement control that records the acknowledging cl...
SUB-SUBSYSTEMREQUIREMENTS-026	subsystem-requirements	When a clinician activates the alarm silence function, the Alert Dashboard Controller SHALL suppress the audible annunci...
SUB-SUBSYSTEMREQUIREMENTS-027	subsystem-requirements	The Multi-bed Overview Processor SHALL generate a ward-level acuity summary screen that colour-codes each bed by the hig...
SUB-SUBSYSTEMREQUIREMENTS-028	subsystem-requirements	The Multi-bed Overview Processor SHALL compute and display per-bed alarm frequency statistics over configurable time win...
VER-VERIFICATIONMETHODS-011	verification-plan	The ECG signal bandwidth and sampling rate of the ECG Acquisition Module SHALL be verified by test, applying calibrated ...