Incident investigations feed performance evaluation by exposing problems with processes and controls and the factors beneath them: the way work is organized, too few resources, or interactions among people (communication) or between people and processes (one activity creating hazards for another). Investigation findings should be used to learn what happened and why the incident, injury or ill health came about, and investigations can also help grasp the context, build knowledge, confirm causes and make sure the corrective actions chosen are the most effective. Investigations should not settle on worker error or misconduct as the cause without weighing organizational and other factors (the pace of work, pressure for productivity, resource levels), which can lead to fatigue and shortcuts that endanger the worker and others.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.