WIP disposition

KPI versioning has a direct effect on auditability because it determines whether you can prove how a metric was defined, calculated, sourced, approved, and changed over time. Without version control, trend reports can become hard to reproduce, exceptions are harder to investigate, and audit evidence may be questioned even if the underlying operations were acceptable.

There is no single fixed interval that fits every plant. AI models using MES data should be revalidated on a risk-based schedule and whenever data sources, process conditions, model logic, equipment behavior, or intended use change materially. In regulated operations, event-based revalidation is usually as important as calendar-based review.

MRB approval usually requires a complete nonconformance record, objective inspection evidence, applicable drawing and specification references, traceability to the affected part or lot, proposed disposition, required engineering and quality approvals, and customer or regulatory approval where the contract or procedure requires it.

MES does not ensure this by itself. It can help enforce latest approved work instructions only when document control, revision governance, routing configuration, user permissions, and system integrations are set up correctly. In regulated plants, the real control is a governed release process with traceable approvals, effective dates, and blocking rules for obsolete content.