Description: time-related proportion within a given period during which an object was able to perform when required; Name: Time-related availability
Description: During a given period of time, percentage of the time during which an item was able to perform when required ; Name: Time based availability
Description: proportion of pump available power input, pa, which is delivered as pump power output, pu, after satisfying the losses resulting from friction due to the relative motion of internal surfaces and internal leakage; Name: hydraulic efficiency