Does anyone know how the equipment availability rate and equipment completion rate are calculated?

Equipment intact rate is the ratio of the number of Class I equipment units and Class II equipment units to the total number of equipment (Class I, II, and III equipment) rated in a fixed period.

[(Number of units of Class I equipment + number of units of Class II equipment)/total number of units of equipment ] x 100 percent.

The number of Class I equipment units and Class II equipment can all start up in normal operation.

Different industries have different customary method, the reason is the same. I posted here is the former Ministry of Water Resources and Electric Power regulations, to the month into the evaluation time (fixed cycle).