Parametric Analysis of 2-Unit Redundant Computer Systems With Corrective and Preventive Maintenance

Establishment of the optimal time interval between periodic inspections for redundant systems

“…A model to determine the reliability of two similar units in active redundancy is presented in [4]. The authors use the Markov model and Laplace transforms to approximate expressions for system reliability and mean time to failure in a model that has an increasing failure rate when one unit is under repair or inspection.…”

“…The most common methods used are Markov and semi-Markov models associated with Laplace transforms and numerical solutions. These methods were used by Laprie et al [4] to study a system where the operating unit's failure rate increased when the other unit was under repair. Ref.…”