Effective measures keep pests out of the facility. The facility is maintained so that entry points such as holes, drains and external windows are identified and managed, and potential breeding sites are kept to a minimum. Items stored outdoors are protected from pest damage and contamination, bird droppings for instance, to a degree suited to what is stored.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.