Reliability, Availability, and Maintainability of Intermittently-usedRepairable Systems

A composite measure comprising linear combination of reliability, availability, andmaintainability (CMRAM) is proposed for an intermittently-used complex repairable system,namely a transport helicopter. The failure data are fitted in Weibull distribution for overlappingintervals of operating time to capture the effect of recent maintenance and other actions. Evaluationof CMRAM is helpful in formulating future operational and maintenance strategies.