A.11.OP:5.2 - Exploration whose value appears in a later decision

A maintenance team must choose next week between Method A and Method B for a recurring seal failure. A bounded probe performed today can return one of three observations: evidence favoring A, evidence favoring B, or an unresolved result that triggers a hold. Today’s immediate action is unchanged, but every possible probe result has a named effect on the later Method-selection decision.

The probe passes the contribution screen. Its horizon ends at that named selection and window. The team still has to decide whether to obtain it.

For a constructed comparison, suppose A, B and holding are all available within the applicable operating constraints. The team minimizes expected hours of later rework or deferral over the same maintenance horizon. Its current model gives three conditions with weights 0.4, 0.4 and 0.2:

These are illustrative planning inputs. On this basis, A and B each cost five expected hours; holding costs four. Suppose the probe distinguishes the three conditions in time. Choosing A, B or holding after its result costs 0.8 expected hours before probe effort. At one hour for the whole probe, the total is 1.8 hours, so the team selects the probe and the stated conditional continuation. At five hours for the same probe, still available before selection, the total is 5.8 hours: the completed advice is to hold on the current basis. If the probe cannot return before selection, its information does not serve this horizon. The operating constraints and uncertainty remain visible in each answer.

If instead the team establishes that every materially plausible observation leads to Method A and no other reliance changes, the probe fails even the contribution screen for that use. The team can choose A directly, without inventing a study and then recording why it was omitted.