Where the system breaks in practice
It rarely breaks through ignorance. It breaks when the correct cloth is in a bucket at the other end of the building and there is a mark on the bench right here. It breaks when a cleaner runs out of the right colour halfway through and finishes the run with what is left. It breaks when a relief cleaner arrives and nobody has told them which colour belongs to which area on this particular site.
Each of those is a supply or staging problem rather than a discipline problem. Enough cloths for the whole run, staged close to where they are needed, with a written note of the site convention, removes most of the failure modes. Instructing a cleaner to try harder removes none of them. The system is designed so the correct action is also the easiest one. Making the right action easy is more durable than making the wrong one forbidden.
