In repairable systems with redundancy, failed units can be replaced by spare units in order to reduce the system downtime. The failed units are sent to a repair shop or manufacturer for corrective maintenance and subsequently are returned for re-use. In this paper we consider a 1 out of n system with cold standby and we assume that repaired units are "as good as new".

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Keywords Maintenance, Optimisation, Reliability, Replacement
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Journal European Journal of Operational Research
Smith, M.A.J, & Dekker, R. (1997). Preventive maintenance in a 1-out-of-n system: the uptime, downtime and costs. European Journal of Operational Research, 565–583. doi:10.1016/S0377-2217(96)00321-9