Abstract
Aiming to reduce the warranty cost, we put forward a new warranty strategy of two-dimensional (2D) warranty products. In this strategy, the incomplete preventive maintenance and minimal repair are proposed where the preventive maintenance is further divided by the degree of maintenance, and all other failures are repaired minimally. Preventive maintenance of different degree is put forward by the manufacturer and the user, respectively, and the repair factor is used to distinguish the different degree of maintenance. We establish model of warranty cost based on reliability theory and propose a method to solve the model. Finally, the validity of this model is proved by a numerical example, and the sensitivity analysis is carried out.
Highlights
During the current warranty service, in order to reduce the cost of warranty and improve availability, it is usually necessary to carry out preventive maintenance after a certain period of product operation
For 2D warranty products which deteriorate with time and usage, such products have the characteristics of high price and high requirement for product availability, so preventive maintenance is very necessary
Only preventive maintenance performed by the user may lead to the problem of low reliability recovery and high maintenance cost. erefore, preventive maintenance assisted by the manufacturer could be a useful method
Summary
During the current warranty service, in order to reduce the cost of warranty and improve availability, it is usually necessary to carry out preventive maintenance after a certain period of product operation. Mathematical Problems in Engineering maintenance with constant maintenance degree during the warranty period He established a cost model under preventive maintenance strategy and obtained the optimal maintenance scheme [7]. Under the cycle preventive maintenance strategy, Shafiee assumed that each preventive maintenance cost is proportional to the product usage time and establishes a warranty cost model [8]. Considering the manufacturer’s point of view, Wang proposed to carry out periodic incomplete preventive maintenance and studied the optimal warranty strategy for products with different usage rates [14]. Nasrum proposed two strategies of incomplete preventive maintenance performed separately by the user and the manufacturer during the warranty period and assumed that the user had certain maintenance capabilities, established a cost model [17]. The last part gives the summary and development direction of the research content
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