Optimal preventive maintenance warranty policy for repairable products with periodically increasing failure rate Online publication date: Wed, 01-Sep-2010
by Syed N. Mujahid, M. Abdur Rahim
International Journal of Operational Research (IJOR), Vol. 9, No. 2, 2010
Abstract: In this paper, a preventive maintenance warranty (PMW) policy for repairable products is investigated. The objective is to determine the optimal number of preventive maintenance (PM) actions, the degree of maintenance and the length of each PM interval; while minimising the total expected warranty cost. The failure rate of repairable products is assumed to be periodically increasing over time. A unique relationship between successive PM intervals is determined. For a special case of failure rate and minimal repair cost, a relationship among the PM intervals is derived. A unique property is inferred from this special case, which relates the maximum failure level in the adjoining PM intervals. The derived relations are illustrated by a numerical example. Yeh and Lo presented a mathematical model for the optimal determination of a PMW policy under similar periodic failure rates. The present study is an extension of their work and shows that unequal PM intervals provide an economic benefit.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Operational Research (IJOR):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook