Inspection plans that measure what the specification actually requires
An inspection plan is a specification translated into characteristics, methods, sampling rules and limits. It goes wrong when it is copied out of a customer document without anyone asking what each line means operationally on the shop floor. A characteristic with no defined method produces results that cannot be compared between two shifts. A limit stated without a measurement uncertainty produces disputes at the boundary, usually with a customer. Sampling copied across from another product produces a confidence level that nobody ever actually calculated.
Building plans per material group rather than per material keeps the library maintainable. Most differences between similar products are limits rather than structure, so a shared plan with product specific values avoids the situation where a change to a common method has to be applied hundreds of times and is applied to most of them. Where a customer imposes its own plan, that belongs as a variant tied to the customer, so nobody has to remember which rules apply to which order.
Recording has to be quick or it will drift. Results read directly from instruments where the instrument allows it, dropdowns where the result is categorical, and free text kept for the observation that genuinely needs words. Where an operator performs an in process check, the check should appear on the same terminal used for production confirmation rather than in a separate application requiring another login. Quality entry that competes with production entry loses, every time, on every shift.
- Characteristics defined with method, sampling plan and limits, not copied text
- Plans held per material group with product specific values, so maintenance stays feasible
- Customer specific plans held as variants tied to the customer, not remembered by staff
- Instrument readings captured directly wherever the instrument allows it
- In process checks presented on the same terminal the operator already uses