[bumby]

The elements you're referring to are procedural mitigations to a poor design from a human factors standpoint. Those mitigations are always less preferred than managing those risks from an engineering perspective.

OSHA actually outlines the preference:

1) Eliminate the hazard outright (not possible here, you need the door to lock sometimes)

2) Engineer out the risk (they tried to do...poorly...with the manual unlock)

3) Administrative controls (e.g., the manual)

4) Personal protective equipment