For repairable products, the warrantor has options in choosing the type of repairperformed to an item failed within the warranty period. We focus on a particular warranty repair strategy, related to the degree of the warranty repair, under non-renewing, two-dimensional, free of charge to the consumer warranty policy. We consider a rectangular warranty region and divide it into four disjoint subregions. Each of these subregions has a preassigned degree of repair for a faulty item. Our main goal is to determine the subregions, so that the associated expected warranty servicing cost per item sold is minimised.
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