One important issue in using the industrial and manufacturing facilities is to consider their impacts on the environment. Many of these equipment have negative effects on the environment when operated for sometimes. In this research the probabilistic logistic times and the destructive effects for maintenance are studied and appropriate model is suggested and evaluated. The aim of the proposed m...

preventive maintenance scheduling of generating units is addressed as a long-term scheduling in power system studies aiming to increase the reliability incorporating cost reduction. it consists of knowing which generating units should be shut down for regular safety inspection. in this paper, a new formulation of preventive maintenance scheduling associated with cost reduction index (cri) is pr...

Maintenance is an important way to ensure the best performance of repairable systems. This paper considers how reduce system maintenance cost while ensuring consistent performance. Due budget constraints, preventive (PM) can be done on only some components. Also, different selections components maintained have markedly effects On basis above issues, this proposes importance-based priority (IBMP...

Aggregate production planning (APP) is one of the most important issues carried out in manufacturing environments which seeks efficient planning, scheduling and coordination of all production activities that optimizes the company's objectives. In this paper, we develop a mixed integer linear programming (MILP) model for an integrated aggregate production planning system with closed loop supply ...

electric power industry have always try to provide reliable electricity to customers and at the same time decrease system costs. high voltage circuit-breakers are an essential part of the power network. this study has developed a maintenance and replacement scheduling model for high voltage circuit- breakers that minimize maintenance costs while maintaining the acceptable reliability. this mode...

Maintenance is a natural and necessary part of the system life cycle and its costs. It is important to control where time and money are spent and what kind of maintenance is performed. For this purpose it is necessary to be able to measure both maintenance, the efforts and costs, and the quality factor maintainability. Such measuring facilitates planning and steering the maintenance work in inf...