In this research, a new hybrid model for the redundancy allocation problem (RAP) in series-parallel configuration with k-out-of-n subsystem is presented. given model, policy set to an active, warm standby, or no redundancy. standby policy, imperfect switch detected component's failure and replaced fail component one. So, subsystems' one of model's decision variables. We presented objective func...

At the SMARTY-22 conference, a review of regenerative methods development was presented, including its application to study non-renewable k-out-of-n system. This paper develops previous for renewable system, an investigation different preventive maintenance strategies based on system state observation. We also include Smith’s regeneration idea development. Some new results are presented that fo...