Description: Probability of an object's suitability when required to be in a working condition under given conditions at a given time and assuming the necessary external resources are provided; Name: immediate availability
Description: Probability that an item is in a state to perform as required at a given instant, under given conditions, assuming that the necessary external resources are provided ; Name: Instantaneous availability
Description: relationship between the total head of the pump and the rate of flow at given operating conditions /rated conditions of speed and liquid; Name: Pump efficiency curve