7661

7133

كارشناسي ارشد

صنايع

اصفهان: دانشگاه صنعتي اصفهان، دانشكده صنايع و سيستم ها

1391

سيزده،78ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

علي زينل همداني

28/1/92

غلامعلي رئيسي، ناصر ملاوردي

مهندسي صنايع و سيستم ها

ID7133

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Warranty cost optimization by considering the customer execution functions Amin Ahmadi Digehsara a ahmadidigehsara@in iut ac ir Ali Zeinal Hamedani Supervisor hamadani@cc iut ac ir Department of Industrial and Systems Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Persian Date 2012 12 19 Abstract A warranty is a contractual obligation incurred by a manufacturer vendor or seller in connection with the sale of a product In broad terms the purpose of warranty is to establish liability in the event of a premature failure of an item or the inability of the item to perform its intended function One of the commonly used warranty policies especially for electronic and mechanical products is Free Replacement Warranty FRW Under FRW the warrantor agrees to repair or replace any failed item up to time W the length of the warranty period from the time of purchase at no cost to the consumer An effective warranty servicing strategy is essential in reducing manufacturers warranty servicing costs and increasing profits from product sales Warranty claims are not always due to product failures They can also be caused by two types of human factors On the one hand consumers might claim warranty due to misuse and or failures caused by various human factors Such claims might account for more than 10 of all reported claims On the other hand consumers might not be bothered to claim warranty for failed items that are still under warranty or they may claim warranty after they have experienced several intermittent failures These two types of human factors can affect warranty claim costs So The human factor plays an important role in modeling the warranty We propose two models to estimate the expected warranty cost when the two types of human factors are included This paper is applying a 2 phase approach to find costs of tow failures In first phase cost of fatal failure is found and in the second phase we demonstrate algorithm for intermittent failures Because of these two failures have difference in structure so their costs optimizing must be different For first phase it has been assumed two repairs that called minimal repair and imperfect repair In contrast for solving the second phase we have utilized linear programming Finally Numerical examples are given to validate the results derived Keywords Warranty servicing Imperfect repair Human factor Intermittent failure Fatal failure

علي زينل همداني

غلامعلي رئيسي، ناصر ملاوردي