EAM.5:11 - SoTA-Echoing

For deciding what the available condition evidence implies for an asset option, adopt MNT.4’s separation of observation, interpretation and forecast, and use the applicable service-evidence component of OPS.18. The Solution matches those claims to the actual unit and duty before using them in eligibility or consequence reasoning. In D’s case, the supplied diagnosis and policy qualification support the continued-use option while the observed vibration alone supports a narrower condition statement. Reusing those adequate results is the selected answer to the present question.

A serious technical alternative, when the asset choice needs a life forecast, is to fit a degradation model and project time to a supported failure criterion. The NIST/SEMATECH e-Handbook of Statistical Methods, section 8.4.2.3, “Fitting models using degradation data instead of failures”, supplies an established regression-based comparator and its physical, measurement and model assumptions. It is useful where that relationship and future-duty transfer are supported; a vibration trend by itself does not supply them. Adapt this modeling route when an obtainable life forecast could change the asset policy or timing. For the already qualified D alternatives, developing it anew would add data, fitting and validation work without being necessary for the stated comparison. The deliberate trade-off is a supported option implication with no independently derived remaining-life date. Neither the handbook nor MNT.4 supplies a real pump’s failure threshold. Reopen the choice when the diagnosis, duty or policy qualification changes, or when a forecast’s expected decision contribution justifies the work of establishing its applicable model and evidence.