The chosen control should be one or more measures giving the highest protection and reliability, meaning those towards the top of the hierarchy; available, meaning it can be bought, made or put in place; and suitable, meaning it will work given the conditions, work process and workers. Where a hazard could cause death or serious injury or illness, more weight goes to controls that remove or reduce the severity of harm than to those that only reduce likelihood. Any new hazards the control introduces must also be managed, and a risk register may record hazards, actions, owners and dates (Appendix D).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.