This paper presents a preventive maintenance (PM) policy for leased equipment over a finite lease period L. Maintenance is entrusted to the lessor. The purpose is to determine the PM period T minimizing the expected total cost over the lease period in a context where repairs and PM actions are imperfect and have non-negligible durations. The leased equipment is periodically subjected to imperfe...

Most production scheduling problems, including High-Variety, Low-Volume (HVLV) scheduling problems assume that machines are continuously available. However, in most actual situations, machines become unavailable during certain periods when preventive maintenance (PM) is scheduled. In this paper, a HVLV scheduling problem is proposed while considering machines availability constraints. Each mach...

We develop a preventive maintenance (PM) model for a unit operated under stressful environment. The PM model in this paper consists of a failure rate model and two cost models to determine the optimal PM scheduling which minimizes a cost rate. The assumption for the proposed model is that stressful environment accelerates the failure of the unit and periodic maintenances reduce stress from outs...

During extended warranty (EW) period, maintenance events play a key role in controlling the product systems within normal operations. However, modelling of failure process and optimization is complicated owing to complex features system, namely, components multi-component system are interdependent with each other some form. For purpose optimizing EW pricing decision scientifically rationally, t...

Corrective maintenance (CM) is carried out to correct failures while preventive (PM) avert failure. They both play an important role in asset management. Accurately estimating the effectiveness of PM needed as it has impact on system health Given failure times and related data, possible estimate maintenance. This paper proposes CM models based different combinations type out, estimates paramete...

The search for a plant maintenance strategy to mitigate the impact of random factory machine failures has never been more challenging. Apart from harsh global competition, manufacturing facilities have become sophisticated and expensive; frequent prolonged breakdowns may ruin firm’s business. Consequently, many turned Preventive Maintenance (PM) solution. However, efficacy PM shown depend on fi...

Several models have been proposed for scheduling the preventive maintenance (PM) of complex repairable systems in industry. These are often application-speci"c and some make unrealistic assumptions about stationarity of the process and quality of repairs. We investigate two principal types of general model, which have wider applicability. The "rst considers "xed PM intervals and is based on the...

A stochastic model for a cold standby system of two identical units is developed in which unit fails completely either directly from normal mode or via partial failure. The unit undergoes preventive maintenance (PM) after a maximum operation time (MOT) at its partial failure stage (PFS). There is a single server who visits the system immediately as and when needed to do preventive maintenance a...