Muthari OS tracks fabrication by zone, not by feeling, for contractors who fabricate what they install. A zone cannot enter the floor until its production drawing is released and its material has been issued from the store — the system refuses and says why. It then moves through the production stages, each stamp recording who, when, and the drawing revision it was performed to, and it cannot be dispatched until factory QC has passed it. Progress is computed from those stamps; nobody types a percentage. This is the operating record of the factory, not a machine-level manufacturing system.
Approved drawing plus issued material, checked at entry. Missing approvals are refused, not warned about, and the refusal names what is missing.
Fabrication, finishing or coating, ready for inspection. Every stamp carries actor, role, time and the built-to revision. Time in stage is shown on the zone card and ages amber then red, so a stuck zone is visible without a phone call.
When engineering revises a drawing, further moves on the superseded revision are refused and the production holders are notified. The stamps already made keep saying which revision they were built to, so the record of what was fabricated to what never has to be reconstructed from timestamps.
Work sent out for coating or glazing is a recorded step on the zone, so a zone at the subcontractor is visibly at the subcontractor, not simply absent from the floor.
Factory QC passes or rejects with a reason that cannot be left blank, and photos. A reject opens a typed rework round, rolls the zone back to the picked stage and notifies production. Rounds are counted and the same gates apply again. Dispatch is refused for any zone QC has not passed.
A QC-passed zone can be put on a delivery note in Logistics; the verdicts themselves live in Quality. Muthari OS is built by contractors in the trade.