Availabilities for a Fixed Periodic System

Availability for a system with fixed periodic time intervals of demand and nondemand is defined for two models which might apply to vehicles, vessels, or aircraft. A specific operational readiness for the model is shown. Figures and a Table are presented in a Supplement as a result of the Monte Carlo simulation; the failure-time and repair-time distributions for the system are exponential, and Weibull or log-normal, respectively.