ME.18:5 - Archetypal Grounding
ME.18:5.1 - Ordinary A.3.1.MR Stop
A maintenance team has six source-traceable calibration Work records using the same released instruction, input schema, equipment configuration, decision authority, and result meaning. One failed record contains an explicit missing-input stop already described by the candidate account. The receiving decision needs only a source-traceable account for comparing two instructions; no tacit cue, disputed variant, consequential transfer, or held-out prediction changes that decision.
A.3.1.MR returns the source-traceable candidate account, any real rival and the important gaps, with its provisional status and comparison-use limits. No distinguishing question or available follow-up is needed for this instruction comparison. ME.18 is not entered; interviews and process mining would add cost without changing the result.
ME.18:5.2 - Genuine Escalation: EC-417 Evidence Reconciliation
The EC-417 decision cannot determine whether internal and supplier-originated evidence reconciliation are one account or scoped variants from ordinary records alone. Here the consequential evidence-closure question, available case access and practitioner capacity justify the larger programme and its whole burden. This constructed reconstruction uses a twelve-case development sample plus one held-out case; that count is not an entry rule for other recoveries:
- four firmware-only and four internal harness-plus-firmware releases accepted versioned provisional pinout evidence before safety closure;
- four supplier-originated releases required signed evidence at closure;
- four reconciliation boards were observed;
- CDM probes involved two supplier, two software, one hardware, and one safety practitioner; and
- a thirteenth supplier-originated change was reserved unseen for the held-out discriminator.
| Evidence move | Scenario contribution | Limit retained |
|---|---|---|
| observation and artifacts | overt evidence versions, board records, integration bundles, approval states, and closure results | no population estimate or tacit-cue claim |
| CDM probes | cues, considered options, judgments about provisional versus signed evidence, and counterfactual reflections in critical incidents | retrospective recall and interviewer effects remain |
| event-log analysis | recorded recurrence and deviations in evidence-version, integration, approval, and closure events | log fields do not establish intent or a reusable Method |
| disclosed expert synthesis | twelve-plus-one sample, internal/supplier scope split, contradiction rule, held-out discriminator, and stop | not attributed to CDM or process-mining sources |
Before inspecting the thirteenth case, the team recorded three rival predictions:
| Account or rival | Cues and decision predicted | Variation and result predicted |
|---|---|---|
C-Evidence-Reconcile-Internal applied beyond its observed scope | internally controlled versioned evidence would be the decisive cue; the internal reconciliation role could decide the branch without a distinct supplier approval | supplier origin would not change the branch; closure could proceed from the internal reconciliation result without signed supplier approval |
C-Evidence-Reconcile-Supplier | supplier-owned configuration and restricted geometry would be decisive; supplier responsibility and signed approval would remain required for closure | reversible early integration could occur, but a signed-delta comparison and affected verification would precede either closure or an explicit missing-approval stop |
R-Rig-Capacity-Only | rig unavailability, rather than evidence origin, would trigger the hold and next-slot decision | the same branch would occur for internal and supplier changes and would clear when rig access returned |
The held-out case then showed cues of supplier-owned geometry, restricted provider access, and available rig capacity; the decision allowed reversible early integration but withheld closure pending signed supplier approval; the variation required a signed-delta comparison and one affected verification; and the result was truthful closure after signed approval arrived at D-8. No load-bearing observation surprised the supplier-scoped account. The available rig contradicted the capacity-only rival for this case, and the retained supplier-approval requirement contradicted the internal-account extrapolation.
The resulting disposition is to keep C-Evidence-Reconcile-Internal for the eight internal cases, keep and narrow C-Evidence-Reconcile-Supplier to supplier-owned configuration with the signed-evidence branch, and retain rig availability as a support condition rather than the account that explains this split. The scope split is not decided by majority count. One held-out supplier case leaves transfer to other suppliers, other configuration classes, and missing-approval situations uncertain; neither account is admitted as a Method, and no effectiveness or population claim is made.
ME.18:5.3 - A Specialist Programme Can Finish without a New Case
A retired repair service used two routing practices. Ordinary A.3.1.MR recovery from its mixed logs and instruction editions cannot tell whether an urgent route was a repeatable cue-based branch or an occasional supervisor override. The receiving museum archive needs a qualified comparison of the two candidate accounts for this service’s final year. It is not deciding to reopen the service or transfer either account to current work.
The larger programme is justified because the disputed cue is absent from the logs. Its claim matrix selects the dated routing sheets and targeted critical-incident interviews with the two available former dispatchers. The sheets record whether replacement stock was present; the logs record only the chosen route. Linking them to the same occurrences shows that the disputed route accompanied absent stock in the accessible cases. Each dispatcher recalls using the stock cue and describes one exception requiring supervisor involvement. Their recalled reasons remain elicited accounts; the routing sheets support recorded stock and routing, not unrecorded intentions or universal recurrence.
The evidence supports a stock-conditioned candidate branch with a separately retained supervisor exception. The archive can now compare that account with the earlier instruction and state the unresolved gaps. A new live repair cannot be observed because the service has closed. Simulating one would test present performance under new conditions, which the archive’s comparison does not need. The programme therefore returns the bounded account, source links, recall limits and unresolved coverage outside the accessible records. It makes no claim about transfer or effectiveness, and it does not identify a Method through these observations.
The programme entered ME.18 and completed useful specialist work. Its stop rests on the adequacy of that work for the receiving comparison. If a later operator wants to reuse the reconstructed branch, that changed use reopens the evidence and check choice; the archive’s descriptive result cannot settle it.