System

The {{entity:Hospital Patient Monitoring System}} decomposition is now complete. This seven-session effort (sessions 169–175) produced a five-subsystem architecture covering vital signs acquisition, alarm management, central monitoring, clinical data integration, and network communication. The final baseline COMPLETE-2026-03-15 captures 101 requirements, 102 trace links, 7 diagrams with 44 blocks and 43 connectors, and 19 verification plan entries.

Decomposition

This session closed two verification gaps rather than decomposing new structure. The {{entity:Vital Signs Acquisition Subsystem}} and {{entity:Central Monitoring Station}} had been fully decomposed into components in sessions 170 and 172 respectively, but neither had verification plan entries.

The full system decomposition diagram:

flowchart TB
  SYS["Hospital Patient Monitoring System"]
  VSA["Vital Signs Acquisition"]
  CMS["Central Monitoring Station"]
  ALM["Alarm Management"]
  CDI["Clinical Data Integration"]
  NET["Network and Communication"]
  SYS --> VSA
  SYS --> CMS
  SYS --> ALM
  SYS --> CDI
  SYS --> NET
  VSA -->|Raw vital sign data| NET
  NET -->|Aggregated waveforms| CMS
  NET -->|Vital sign streams| ALM
  ALM -->|Alarm notifications| CMS
  NET -->|Monitoring data| CDI

The Central Monitoring Station internal structure, which drove four of the new verification entries:

flowchart TB
  DRE["Display Rendering Engine"]
  PTM["Patient Tile Manager"]
  TAE["Trend Analysis Engine"]
  ADC["Alert Dashboard Controller"]
  MBO["Multi-bed Overview Processor"]
  PTM -->|tile content| DRE
  TAE -->|trend graphs| DRE
  ADC -->|alarm status overlay| PTM
  MBO -->|bed priority ranking| PTM
  TAE -->|deterioration signals| MBO

Analysis

The semantic lint raised three findings. The highest-severity finding identifies that the system entity {{hex:55FF7319}} lacks the Physical Object trait despite stakeholder requirement {{stk:STK-STAKEHOLDERNEEDS-001}} imposing physical constraints. This is ontologically correct — the system-of-systems is an abstract composite — but a requirement defining its physical embodiment (rack units, enclosure standards) would strengthen the specification.

Cross-domain similarity search on the {{entity:Signal Conditioning Unit}} ({{hex:50F53018}}) returned a 93.8% Jaccard match against a generic processor entity and 90.6% against the {{entity:Inertial Navigation System (INS)}} from the autonomous vehicle project. Both are signal-processing pipelines that condition raw sensor data into calibrated outputs. The trait overlap confirms the Signal Conditioning Unit is correctly classified as a deterministic, state-transforming processing component rather than a sensing device.

The pulse oximetry and NIBP modules share 80% Jaccard similarity, which reflects their common role as intermittent physiological measurement devices. The ECG module diverges at 63% due to its continuous-acquisition nature and higher bandwidth demands.

Requirements

Eight verification plan entries were created this session, completing coverage for the two previously unverified subsystems:

Vital Signs Acquisition ({{ver:VER-VERIFICATIONMETHODS-012}} through {{ver:VER-VERIFICATIONMETHODS-015}}): ECG bandwidth and sampling rate verification by calibrated sine wave injection; SpO2 accuracy across five saturation reference points; NIBP oscillometric accuracy with cuff pressure safety limits; Signal Conditioning Unit mains interference rejection at 50 Hz and 60 Hz confirmed to 40 dB attenuation.

Central Monitoring Station ({{ver:VER-VERIFICATIONMETHODS-016}} through {{ver:VER-VERIFICATIONMETHODS-019}}): Display Rendering Engine waveform refresh rate at 25 fps minimum; Patient Tile Manager capacity at 32 simultaneous patients with alarm-priority reordering within 2 seconds; Trend Analysis Engine 72-hour buffer retention with deterioration detection; Multi-bed Overview Processor ward-scale refresh within 3 seconds.

All eight entries are traced to their parent subsystem requirements via verifies links. The project now has 19 verification entries covering all five subsystems.

Next

The Hospital Patient Monitoring System is complete and cleared from active project state. The next session should select a new system from the seed list, prioritising a domain not yet covered. Completed systems are se-autonomous-vehicle (transport) and se-hospital-patient-monitoring (medical). A good next pick would be from the energy, defence, or civil engineering domain — solar farm with battery storage or naval combat management system would maximise domain diversity.