Flexible manufacturing cells (FMCs) often operate with increasing failure rate due to extensive utilization and wear-outs of equipment. While maintenance plans can eliminate wear-out failures, random failures are still unavoidable. This paper discusses a procedure that combines simulation and analytical models to analyze the effects of corrective, preventive, and opportunistic maintenance polic...

Recent developments in health care are strikingly congruent with a Marxist paradigm. For many years small scale owner producers (physicians) dominated medicine, and the corporate class supported the expansion of services. As health care expanded, corporate involvement in the direct provision of services emerged. This involvement is reflected not only in the rise of for-profit providers, but als...

Modern telecommunications systems are becoming increasingly complex, both in their internal construction and the degree of interconnectivity and interdependence between systems. This situation is exacerbated by regulatory demands for operator interworking and requirements for high quality delivery to the users. In this context, the crucial issue is that of the ability of systems to retain their...

A condition based preventive and corrective maintenance policy is proposed for a continuously operating system. The condition of the system is assumed to deteriorate with time. The model incorporates both deterioration as well as random common cause failures. The deterioration stages are modeled as discrete state processes. The system is put to random inspection to know the condition. The mean ...

Condition based maintenance (CBM) aims to reduce maintenance cost and improve equipment reliability by effectively utilizing condition monitoring and prediction information. It is observed that the prediction accuracy often improves with the increase of the age of the component. In this research, we develop a method to quantify the remaining life prediction uncertainty considering the predictio...

For leased equipment the lessor incurs penalty costs for failures occurring over the lease period and for not rectifying such failures within a specified time limit. Through preventive maintenance actions the penalty costs can be reduced but this is achieved at the expense of increased maintenance costs. The paper looks at a periodic preventive maintenance policy which achieves a tradeoff betwe...

The purpose of this article is to propose both state and time-dependent preventive maintenance policy for a multi-state deteriorating system, which is equipped with inspection equipment(s) connected to a computer center. After the system being identified as state x at nd through computation by the computer center after inspection (or measurement) via equipment(s), one maintenance action with th...

A maintenance problem of a linear consecutivek-out-of-n: F system with load-sharing dependent components is considered. This system consists of n components which are arranged linearly and fails if k consecutive components fail [1]. This system is commonly found in the integrated circuits, relay stations in telecommunication system, oil pipeline system, vacuum system in accelerators, and spacec...

Condition monitoring is the foundation of a condition based maintenance (CBM). To relate the information obtained from the condition monitoring to the actual state of the system, it is usually required a stochastic model. On the other hand, considering the interactions and similarities that exist between CBM and statistical process control (SPC), the integrated models for CBM and SPC have been ...

today according to the competitive conditions, companies try to reduce their inventory level to diminish the costs. in companies inventory management and control should establish a balance between inventory level of spare parts, cost and the risk that arising from absence of part when is needed. it is clear that this level of spare parts inventory affected by facility characteristics and its re...