Vehicle condition is kept safe by the practical skills of the people who inspect, service and manage the fleet, so anyone holding a position of responsibility in the maintenance management system must be competent to apply the operator's schedules and instructions. Three things are looked for: people responsible for verifying maintenance standards or for doing maintenance are trained in, and know, the specific policies and procedures they carry out; where a role involves complex mechanical assessment, the person can show competence through a relevant trade qualification or documented equivalent experience; and the people who drive the vehicles have enough practical awareness to notice and report defects.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.