Classical warranty plans require crisp data obtained from strictly controlled reliability tests. However, in a real situation these requirements might not be fulfilled. In an extreme case, the warranty claims data come from users whose reports are expressed in a vague way. Furthermore, there are special situations where several characteristics are used together as criteria for judging the warra...

Warranty data contain useful information about product quality and reliability, but they are usually coarse data because they may be aggregated, delayed, censored, missing or vague. They might, however, be the only forms of warranty data a manufacturer has, analysing such data are therefore needed and can also be of benefit to manufacturers in identifying early warnings of abnormalities in thei...

5.1 INTRODUCTION Up to now, warranty cost models for new products have been analyzed. In view of the present day market, customers are more attracted towards the secondhand products. Thus the present and the succeeding chapters of this thesis focus on analyzing the secondhand products by providing two-dimensional warranty for such products. A two-dimensional warranty policy is characterized by ...

The cost of servicing a warranty depends, amongst other factors, on the type of repair performed under warranty. Although ‘‘all minimal repair’’ and ‘‘all replacement’’ policies are easy to implement and analyze, they are not always feasible and/or practical. Having a combination of different types of repair often leads to lower warranty servicing costs. In this article, to reduce the warranty ...