On paper, many cells in Taichung Hsien already have overlap. The roster shows thirty minutes. The canteen is full at the same time. Incoming people hang bags, find gloves, and listen to a story about “a bit of trouble on three.” Outgoing people are already late for a scooter. The overlap exists. The work of overlap does not.
We time that gap in Shop Floor Cadence because plants treat it as weather. Weather cannot be owned. A ten-line pass can. The lines are ugly: job, station, minutes already lost, next physical action, who holds the board if the named owner is in quality. If it cannot be read with gloves, it is a memo, not a handover.
Taiwan’s shift patterns are not the villain. Two-shift machining houses and three-shift assembly sites both lose the same class of hour: the one where nobody is allowed to look slow, so nobody writes the stall. Night crew then inherits a riddle and restarts a job that was technically live.
The fix is not a longer overlap on the roster. Longer overlap without a protocol just lengthens the canteen story. Name a deputy for the last hour of the outgoing shift. Stage the one thing the incoming person will touch first. Stop narrating mood. The hour comes back in pieces, which is how hours actually return.
Related studio: Shop Floor Cadence, and the shorter Handover Without Drift.