Administrative controls should be considered when higher controls are not practicable or to supplement them, and for carcinogens only as extra protection. They matter for emergencies when other controls fail, such as spills and leaks and for workers who clean up or do regular cleaning and maintenance. Examples: written rules, such as a spill clean-up procedure; job rotation to limit chronic exposure; purchasing policies such as just-in-time ordering and pre-mixed chemicals; restricted area rules; procedures to keep ignition sources out of hazardous areas; work methods that minimise the time mixers, reactors or ovens are open; cleaning and control maintenance schedules; vacuuming or wet sweeping in place of dry sweeping; bans on eating, drinking and smoking where chemicals are used; and washing facilities. Training and supervision must always back them.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.