# Exact unsent Grok prompt — EM-OPS-03

Independent enterprise metamodel review. Do not browse, invent identifiers or claim standards conformance.

EM-OPS-03 covers AssetInstance, Custody, MaintenancePlan, MaintenanceEvent and CalibrationEvent. Available evidence includes legacy WM-ECO-011 Economic Asset view, WM-ACT-007 Work Order, WM-OBJ-001 Physical Item, WM-ACT-034 Assessment and WM-MAT-008 Observation; WM-OBJ-022 Asset Lifecycle and WM-OBJ-023 Measuring Instrument are reserved candidates.

Assess this proposal: Asset Instance and Custody profile WM-OBJ-001; WM-OBJ-022 is a projection; WM-ECO-011 is only an aligned holding view; WM-ACT-007 authorizes work but never proves execution. Maintenance Plan, Maintenance Event and Calibration Event are identifier-unassigned new-model candidates. Keep title, custody, operational responsibility, location and access separate. Component replacement follows a versioned identity-continuity rule and never transfers calibration silently. Calibration binds one instrument/configuration to a pinned method, references, traceability chain, range, results, uncertainty, decision rule, certificate and validity conditions. Fitness is derived for a purpose.

Test a leased instrument, replacement of its measuring subsystem and an expired calibration while preserving title, custody, responsibility, component and suitability history. Reject class-level propagation of one instrument's successful calibration to every instrument of its model.

Return <=900 words with: Verdict; strongest evidence; strongest counterexample; identity/mastership; title/custody/responsibility; component continuity; maintenance plan/order/event; calibration event/certificate; validity/fitness; scenario; at least 10 invariants; minimum model set; blockers. Explicitly decide which candidates require independent identity.