📖What it is

Watches the handoffs between work stations and catches stalls.

This keeps an eye on the gaps where work passes from one stage to the next and raises a flag if something gets stuck. No single helper owns the watching, so nothing is missed at the seams. The operator's monitoring helper relies on it.

🔌Who calls it (1)

Worked out from who actually calls it, not from a note somebody wrote.

🧮Other monitoring accountability machinery