Reliability models of maintained systems

الملخص EN

In this papers we studying reliability models of maintained systems, and we take some definitions and general concepts that to help in calculating maintained systems such as, time to repair (pdf), meantime between-failure (MTBF), repair rate and mean time to repair (MTTR), some of the commonly used maintainability engineering terms are introduced, at last we using exponential distribution in evaluating maintainability models.