Optimal maintenance policies with preventive maintenance

In this paper, two maintenance policies, the block replacement policy and the age replacement policy, have been investigated, and compared under the warranty. Although there is much comparative research between the age replacement policy and block replacement policy, we focus on comparisons of both the maintenance policies, considering the warranty. We develop two maintenance cost models, with considerations of non-renewable and renewable warranty policies subject to minimal repair for the warranty period and the post warranty period, using failure times and repair times. Numerical examples are discussed, to demonstrate the applicability of the methodology derived in the paper.