Study of A Two-stage Random Warranty to Maintain Fairness

Driven by digital technologies, high-tech product management personnel can ensure the product reliability by means of monitored working cycles. In this paper, a manufacturer's random warranty is designed to ensure the reliability during the warranty stage and a consumer's random maintenance policy is modeled to ensure the reliability during the post-warranty stage. The designed random warranty is named a two-stage two-dimensional free repair warranty (2DFRW), where the product is minimally repaired at each failure and the regions of the second stage warranty are different in order to remove all inequities resulting from the first stage warranty.