Risks

The cart is loaded after the press stops

Risk	If the next job is not known in time, the cart is loaded during the change and no minutes move out of the stop.
Early sign	A press stands open while someone is away from it, fetching.
Mitigation	The shift supervisor names the mold changes due at the start of each shift.
Impact	The price of the carts, about $9,000, with no minutes saved.

Risk	The carts are used for some weeks, then skipped on a busy shift, and the waiting comes back.
Early sign	The job log's median change on one shift rises back toward 63 minutes.
Mitigation	One named person per shift for the carts, and the change times read by shift each week.
Impact	Up to about $20,300 per year, if every shift goes back.