Initial situation and the two users

A producer must deliver 120 acceptable brackets per working day in two fixture variants. The receiving assembly requires a finished bore of 20.000 ± 0.020 mm. Machining is internal; coating may be external and can alter the dimension needed by that assembly.

A shift contains 480 minutes. Two expected changeovers take 25 minutes each. A nominal three-minute machining cycle is quoted, but yield, rework, measurement uncertainty and sustained capability are not established.

For the supported-path question, a further illustrative observation is available: production planners and operators repeatedly reconstruct which drawing, material lot, fixture and NC-program edition a returned coated lot belongs to. A drawing file and a dispatch note circulate, but their relationship to the returned physical parts and final-dimensional decision is not reliably recoverable.

The platform users are the people preparing and performing production work. The bracket user’s assembly task is a different use. A clearer dispatch interface may help the former without establishing that the latter can assemble conforming brackets.