RMP.2:5.1.2 - Select the disposition under the supplied facts
Compare the following relations when their supplied conditions make them serious:
| Option | Evidence and criticism relation | Principal loss or dependency |
|---|---|---|
| stop on current evidence | Use an applicable result that already answers whether this acceleration condition preserves the relevant mechanism relation. | Cannot support a stronger maintenance or universal-life claim. |
| experimental mechanism comparison | Compare degradation under the candidate accelerated and field-representative conditions using the mechanism-sensitive relation derived in §5.1.1; challenge acceleration-induced mechanism change and alternative material effects. | Requires qualified indicator relation, instrument feasibility, specimen/material comparability, safety, and authority. |
| field/observational relation | Use obtaining field exposures, failures, material batches, installation histories, and operating contexts to challenge whether the laboratory relation transfers. | Confounding, selection, sparse failure, measurement, and access may limit discrimination. |
| computational/model challenge | Test the proposed mechanism and acceleration relation through a domain-qualified model, sensitivity, calibration, and validation target. | Model-to-phenomenon relation, parameter identifiability, implementation, data, and validation can dominate. |
EvidenceSufficientStop scenario. A newly supplied current result already shows, with compatible materials and operating envelope, that the proposed acceleration condition changes the dominant degradation mechanism. The answer condition is met by the supported rejection of that test condition’s relevance. RMP.2 returns the exact result, limitations, and reopen condition; it does not run an experiment to confirm an answer already sufficient for this use.
ResearchDesignDecision scenario. The supplied conditions in §5.1.1 make the derived signature comparison discriminating, obtainable and worthwhile. RMP.2 selects that experimental family and criticism against the actual field, model and no-new-study alternatives. PostSelectionNeed contains only the repository locator and serialization of already-required specimen, condition, observation and deviation fields. The admissible choices change neither family nor criticism; an inability to record any required field falls outside the admitted range and reopens selection.
ResearchDesignHold scenario. The measurement owner has not established whether the proposed indicator distinguishes the two rival degradation mechanisms. One plausible result makes the experimental comparison discriminating; another makes it incapable of answering and favors field observation or a different model relation. RMP.2 returns a hold to the measurement/domain owner for that indicator-feasibility result, names both consequences, and begins no protocol Work. Whether to obtain the indicator-feasibility result remains a separate commitment.
QualifiedNoNewStudy scenario. The available evidence does not establish the relation for the bounded Pump-P4 case. The supplier confirms that the matched specimens no longer exist, and the qualified current frame shows that the obtainable field and model material cannot discriminate the competing mechanisms for that case. The present allocation answer is no new study: the relation remains unresolved. A future specimen collection would concern a different case and cannot recreate the lost comparison. If newly released, qualified field records make a relevant discriminating comparison obtainable within the available resources, reopen that choice and assess the useful study. Neither the earlier no-study answer nor a later selected design decides the maintenance interval.