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Warranty servicing for discretely degrading items with non-zero repair time under renewing warranty
, Article Computers and Industrial Engineering ; Volume 65, Issue 1 , 2013 , Pages 176-185 ; 03608352 (ISSN) ; Mahlooji, H ; Jahromi, A. E ; Sharif University of Technology
2013
Abstract
This paper considers a repair-replacement strategy for a special class of discretely degrading and repairable products under renewing free replacement warranty. Each product may experience N different working states with different exponential hazard functions, before the warranty contract expires. Once the item enters working state i (i = 1,2, ⋯ ,N), it can either fail or move to any of the subsequent working states with different probabilities, given that a transition has been made. In the former case, the best rectification action, replacement or minimal repair, regarding the failure status, i.e., the product degradation level at the failure time and the remaining warranty time, should be...
On optimal replacement-repair policy for multi-state deteriorating products under renewing free replacement warranty
, Article Computers and Mathematics with Applications ; Volume 61, Issue 4 , February , 2011 , Pages 840-850 ; 08981221 (ISSN) ; Chukova, S ; Mahlooji, H ; Sharif University of Technology
2011
Abstract
In this paper a replacement-repair model is developed to study a renewing free replacement warranty (RFRW) for a class of multi-state deteriorating repairable products. After a replacement, the product warranty is renewed. Two parameters affect the manufacturer's decision to minimally repair or replace a failed item: the product deterioration level at the time of failure and the remaining warranty time. We derive an optimal replacement-repair policy to minimise the expected warranty servicing cost per item sold. In the case of a product with two different working states, we are able to explicitly find the optimal values of the replacement-repair parameters using the Adomian decomposition...
Warranty servicing for special class of multi-state deteriorating products under renewing free-replacement warranty
, Article 40th International Conference on Computers and Industrial Engineering: Soft Computing Techniques for Advanced Manufacturing and Service Systems, CIE40 2010, 25 July 2010 through 28 July 2010 ; 2010 ; 9781424472956 (ISBN) ; Mahlooji, H ; Eshraghnia Jahromi, A ; Sharif University of Technology
Abstract
We develop a replacement-repair model to study a renewing free replacement warranty (RFRW) for a class of multi-state deteriorating repairable products. Each product may experience N different working states with different hazard functions, before the warranty contract expires. Once the item enters working state j(j = 1, 2, . . . , N), it can either fail or move t any of the subsequent states. In the former case, the best rectification action, replacement or minimal repair, regarding the failure status, should be done to put the item into operation. In each working state there is a determined probability for transition to each of the subsequent working states. After a replacement the product...