Replacement First and Last Policies with Random Times for Redundant Systems
Satoshi Mizutani, Mingchih Chen · 2023
Failures of complex systems such as networks and database systems sometimes cause great damage in society. Therefore, suitable maintenance schedules are very important to assure the safety and reliability of systems to avoid their failures. There exist several factors to plan maintenance policies. For example, some maintenance might be done after work, or after occurrence of serious damage due to a natural disaster, which would be difficult to predict previously. Therefore, replacement times are assumed to be random variables. We discuss several maintenance policies which minimize the expected cost rates and compare them.