UNAVAILABILITY (STEADY STATE)
Definition
An <UNAVAILABILITY (STEADY STATE))> is an <IndirectProperty> that refers to a <PROBABILITY> that is the mean of the instantaneous unavailability under steady-state conditions over a given time interval. Note. - Under certain conditions, for instance constant failure rate and constant repair rate, the steady-state unavailability may be expressed by A <RATIO> of the mean down time to the sum of the mean up time