Architecture

Architecture: One UofA per Context of Use

UofA models credibility assessment at the COU level, not the individual factor level. Each UofA packages the complete credibility decision for one Context of Use — including all per-factor assessments as embedded CredibilityFactor nodes and any detected quality gaps as WeakenerAnnotation nodes.

Morrison Blood Pump Assessment
├── morrison/cou1/uofa-morrison-cou1.jsonld (ProfileComplete)
│   COU1: CPB Use (Class II) — Model Risk Level 2
│   ├── hasContextOfUse    → COU1 node
│   ├── bindsRequirement   → hemolysis safety requirement
│   ├── bindsModel         → ANSYS CFX v.15.0 + Eulerian HI model
│   ├── bindsDataset       → [PIV data, hemolysis in vitro data]
│   ├── hasValidationResult → [mesh convergence, PIV velocity, hemolysis comparison]
│   ├── hasCredibilityFactor → [13 V&V 40 factors: 7 assessed + 6 not-assessed]
│   ├── hasWeakener        → [W-AL-01 (3×), W-AR-05 (3×), W-EP-02 (3×), W-CON-04, W-ON-02]
│   ├── hasDecisionRecord  → "Accepted for COU1"
│   ├── hash               → sha256:<real hash>
│   ├── signature          → ed25519:<real signature>
│   └── wasDerivedFrom     → Morrison DOI
│
└── morrison/cou2/uofa-morrison-cou2.jsonld (ProfileComplete)
    COU2: VAD Use (Class III) — Model Risk Level 5
    ├── hasCredibilityFactor → [13 V&V 40 factors: 7 assessed + 6 not-assessed]
    ├── hasWeakener        → [W-PROV-01 (7×), W-EP-04 (6×), W-ON-02, W-AL-02, W-CON-04] + [COMPOUND-01 (2×)]
    └── At MRL 5 the risk-driven catalog shifts: W-PROV-01 dominates COU2 (7 provenance-chain orphans),
        W-EP-04 fires 6× on not-assessed factors, and two of W-PROV-01's Criticals coexist with High
        weakeners — triggering 2 COMPOUND-01 cascades that don't fire under COU1's lower-MRL profile.

Shared entities (model, datasets, pump geometry) are referenced by IRI, not duplicated. The divergence between COU1 and COU2 weakener profiles is the central analytical demonstration.