this paper seeks to explore the status of municipalities in the implementation of local social policy based on the existing legal framework though analyzing all legislations and regulations pertaining to municipalities (specially tehran municipality). the paper uses both quantitative and qualitative content analysis and applies thematic analysis. research findings indicate that most of tasks an...

We study joint preventive maintenance (PM) and production policies for an unreliable production-inventory system in which maintenance/repair times are non-negligible and stochastic. A joint policy decides (a) whether or not to perform PM, and (b) if PM is not performed, then how much to produce. We consider a discrete-time system, formulating the problem as a Markov decision process (MDP) model...

In this paper, the maintenance optimization problem of multi-component system is considered. It assumed that exact cause failure might be masked. That is, unknown, and we only know it belongs to a set called mask set. Both opportunistic perfect preventive (OPPM) corrective are Threshold OPPM inter-inspection interval considered as decision parameters which optimized using long-run cost rate cri...