Preventive replacement schedule: a case study at a processing industry
by Rosmaini Ahmad, Shahrul Kamaruddin, Ishak Abdul Azid, Indra Putra Almanar
International Journal of Industrial and Systems Engineering (IJISE), Vol. 8, No. 3, 2011

Abstract: The application of the preventive maintenance (PM) strategy to reduce machine breakdown problems has been discussed in many studies. One of the popular strategies that widely use it is preventive replacement (PR), which aims to determine the optimum replacement time. The critical issue, however, is that most studies assume the aging (lifetime) of a component to be time dependent. In reality, the failure of a component is influenced by an external factor (covariate). This paper presents the process of revising or updating the PR time by considering external factors (the covariates effect) by using the proportional hazard model (PHM). The revised PR time is determined based on the age replacement model (ARM) and block replacement model (BRM). The effects of the revised PR time on the reliability cycle and cost reduction for both ARM and BRM are compared. The results show that the application of ARM is more beneficial in terms of cost saving, while the application of BRM results in a higher reliability cycle. A corresponding case study in the processing industry is presented.

Online publication date: Mon, 25-Jul-2011

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