A new R&M measure and its estimation

The reliability and maintainability measure is referred to as MTUT. It is the mean time to restore an equipment and its maintenance system to its original working status; it is expressed as a proportion of the mean time to failure for any given equipment. This measure integrates maintenance and repair time expenditures of all types from three levels of maintenance. Other measures discussed in the literature such as availability, mean time to repair, and average queue length are compared to MTUT. A testing program for the demonstration phase of equipment development is presented. Estimation and discrimination procedures are derived for MTUT using data from the outlined testing program. Large-sample theory is used to construct both interval estimates and discrimination procedures for the MTUT, using data acquired from the assessment phase of equipment development