01Choose one boundary
Use one product family, one release-to-ship boundary and one fixed review window.
Use the same boundary for work-in-process, exits and one late-job trace.
Same-boundary example
Start here: choose one product family and one time boundary.
Use one product family, one release-to-ship boundary and one fixed review window.
Opening WIP + entries - exits must reconcile to closing WIP inside that boundary.
Record release, queue, work, inspection and ship timestamps with evidence.