System

New system: {{entity:Cybersecurity Operations Centre}} ({{hex:40A57AD9}}), covering the IT domain — the first pure information-security system in the decomposition programme. Project se-cybersec-ops-centre scaffolded from scratch with 6 standard documents, 5 trace linksets, 2 block diagrams, 9 classified subsystems, 8 stakeholder requirements, 12 system requirements, and 13 trace links. Status: scaffolded.

Decomposition

The SOC decomposes into nine subsystems reflecting real organisational and technical boundaries: {{entity:SIEM Engine}} ({{hex:51F77B19}}) as the central correlation backbone; {{entity:Network Security Monitoring Subsystem}} ({{hex:40A53219}}) for passive/active traffic analysis across 200+ segments; {{entity:Endpoint Detection and Response Subsystem}} ({{hex:51F77B19}}) covering 50,000+ host agents; {{entity:Threat Intelligence Platform}} ({{hex:40F77319}}) aggregating 20+ CTI feeds via STIX/TAXII; {{entity:Vulnerability Management System}} ({{hex:41F77B19}}) for continuous scanning and risk scoring; {{entity:SOAR Platform}} ({{hex:51B77B19}}) orchestrating 150+ automated playbooks; {{entity:Identity and Access Monitoring Subsystem}} ({{hex:41B77319}}) performing UEBA across AD/Azure AD/PAM; {{entity:SOC Facility Infrastructure}} ({{hex:DE851018}}) providing the physical environment with 72-hour autonomous power; and {{entity:Communications and Reporting Subsystem}} ({{hex:40A57B58}}) handling regulatory notifications and analyst collaboration.

The SIEM is the architectural centre of gravity — every detection subsystem feeds into it, and it feeds the SOAR for response orchestration. The data flow is a hub-and-spoke pattern with the SIEM as hub and SOAR as the action dispatcher.

flowchart TB
  SIEM["SIEM Engine"]
  NSM["Network Security Monitoring"]
  EDR["Endpoint Detection and Response"]
  TIP["Threat Intelligence Platform"]
  VULN["Vulnerability Management"]
  SOAR["SOAR Platform"]
  IAM["Identity and Access Monitoring"]
  FAC["SOC Facility Infrastructure"]
  COMM["Communications and Reporting"]
  NSM -->|Network alerts, metadata| SIEM
  EDR -->|Endpoint telemetry, alerts| SIEM
  TIP -->|IOC enrichment data| SIEM
  VULN -->|Vulnerability context| SIEM
  IAM -->|Identity alerts| SIEM
  SIEM -->|Correlated alerts| SOAR
  TIP -->|Threat context for playbooks| SOAR
  SOAR -->|Containment commands| EDR
  SOAR -->|Notifications, reports| COMM

Analysis

The most striking classification result is that {{entity:SIEM Engine}} and {{entity:Endpoint Detection and Response Subsystem}} share identical hex codes ({{hex:51F77B19}}). Both are {{trait:Powered}}, {{trait:Active}}, signal-processing systems that ingest high-volume telemetry, apply detection logic, and produce prioritised alerts — the ontological fingerprint cannot distinguish them at this trait resolution. Cross-domain similarity search reveals that the SIEM shares 31 of 32 traits with the Autonomous Vehicle’s Behavior Planner, the Emergency Dispatch system’s Alarm Detection Engine, and the Naval CMS’s Gun Fire Control System. The common thread: real-time ingestion of sensor data, rule/model-based correlation, and time-critical output to an action layer. This suggests detection-and-response architectural patterns may transfer across domains.

{{entity:SOC Facility Infrastructure}} ({{hex:DE851018}}) stands apart — it is the only subsystem with {{trait:Physical Object}} and {{trait:Structural}} traits active, reflecting its role as the built environment rather than a software system.

Requirements

Eight stakeholder requirements capture the core SOC mission: {{stk:STK-NEEDS-001}} (MTTD under 15 minutes), {{stk:STK-NEEDS-002}} (MTTR under 60 minutes for critical), {{stk:STK-NEEDS-003}} (NIST/ISO compliance), {{stk:STK-NEEDS-004}} (24/7 operations), {{stk:STK-NEEDS-005}} (complete asset visibility), {{stk:STK-NEEDS-006}} (multi-source CTI), {{stk:STK-NEEDS-007}} (regulatory reporting timelines), and {{stk:STK-NEEDS-008}} (100K endpoint scalability). Twelve system requirements decompose these into measurable, subsystem-allocable specifications: SIEM correlation latency of 120s ({{sys:SYS-REQS-001}}), 150K EPS sustained ingestion ({{sys:SYS-REQS-002}}), 30-second EDR containment execution ({{sys:SYS-REQS-003}}), SOAR playbook execution within 60s ({{sys:SYS-REQS-004}}), 20-feed TIP integration ({{sys:SYS-REQS-005}}), 90/365-day log retention ({{sys:SYS-REQS-006}}), 7/30-day scan cycles ({{sys:SYS-REQS-007}}), 99.95% platform availability ({{sys:SYS-REQS-008}}), 30-minute breach notification generation ({{sys:SYS-REQS-009}}), 10Gbps NSM capture ({{sys:SYS-REQS-010}}), 5% UEBA false positive ceiling ({{sys:SYS-REQS-011}}), and 72-hour facility autonomy ({{sys:SYS-REQS-012}}). All 13 STK→SYS trace links established.

Next

First-pass decomposition should begin with the SIEM Engine — it is the highest-risk subsystem with the most interfaces and the tightest performance constraints (120s correlation at 150K EPS). Subsystem requirements for the SIEM need to cover log parsing, detection rule management, search indexing, cluster scaling, and the correlation engine itself. The SOAR Platform is the second priority given its role as the action orchestration layer. Interface requirements between SIEM→SOAR and SOAR→EDR are critical and should be specified early.