The fault rate is a quality criterion and/or a characteristic value of technical systems. It can be determined on the basis of organizational, technical, maintenance of test-related downtime reasons.
The organizational fault rate (eq. 1) illustrates the fault rate percentage due to organizational lacks and refers to the holding time:
eq. 1:
The technical fault rate (eq. 2) illustrates the fault rate percentage due to technical lacks and refers to the holding time:
eq.
The maintenance fault rate (eq. 3) illustrates the fault rate percentage due to planned maintenance activities which reduce the holding time:
eq. 3:
The rest-related fault rate (eq. 4) illustrates the fault rate percentage due to tests and refers to the holding time:
eq. 4:
Modern process data collection software makes it possible to capture and visualize different fault rates.