問題文
An airline's maintenance division is specifying a model that predicts which components will need replacement at the next scheduled check. The engineering director has written the requirement as an accuracy figure. An auditor points out that the requirement is incomplete. Which addition is most necessary for this use?
選択肢
- A statement of which of the two error directions is acceptable and to what extent, because replacing a sound component and missing a failing one carry consequences of entirely different kinds.
- A condition that the model be retrained every month so that the accuracy figure stays current.
- A provision that the accuracy be measured against the manufacturer's published component life figures, since those figures represent the authoritative expectation for each part and give the division an external reference point that does not depend on its own maintenance history.
- A requirement that the model's output be recorded in the maintenance system alongside the technician's decision, so that the airline can later show the regulator that every prediction was reviewed by a licensed engineer before any component was removed from an aircraft.