Design for parts fanning across shop-floor stages (e.g. 10 at Masking,
20 at Plating, 20 at Baking on one 50-part job):
- Tracking model C — fluid per-stage quantities via existing qty_at_step;
failed/held/rework subsets ride existing hold/scrap/rework records.
- Board Option 2 — a card per stage-presence (composite job:area keys);
unsplit jobs render identically to today.
- Easy-advance operator flow — one "Send to next" action, steppers /
rack-tap (no keyboard), intent-named Hold/Scrap/Rework buttons.
- Light-up plumbing — auto-ready on arrival, qty-aware predecessor gate,
auto-finish source on drain; no auto-start (labour accuracy).
- Close — wait to reconverge; close/cert/ship/invoice lifecycle unchanged.
Additive only: no new core model, no data migration, no change to the
quantity model, OWL component tree, or close lifecycle.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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