Protective systems must be sized so that an explosion's effects fall to a safe enough level; be designed and positionable so explosions do not spread through chain reactions or flashover and incipient explosions do not become detonations; keep working through a power failure long enough to avoid danger; and not fail through outside interference. At planning stage they must allow for the expected explosion pressure under extreme conditions and the flame's heating effect; systems that resist or contain explosions must withstand the shock wave without losing integrity, and connected accessories must withstand the maximum explosion pressure; reactions in peripheral equipment and pipework must be considered; pressure relief must be provided where stresses may exceed structural strength, without endangering people nearby; suppression systems must react at the earliest stage with regard to the maximum rate of pressure rise and maximum pressure; decoupling systems must stay proof against transmission of internal ignition and keep their strength; and protective systems must be integrable into an alarm circuit that stops product feed and shuts down parts that can no longer run safely.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.