On Possibility of Extending the Optimal Replacement time of Series and Parallel Systems

Document Type : Review Article


1 Department of Science, Bayero University, Kano, Kano State, Nigeria

2 Department of Mathematics, Federal University, Dutse, Jigawa State, Nigeria


Among all systems, the series system has the lowest optimal replacement time, while the parallel system has the highest optimal replacement time. This paper is comparing the standard age replacement strategy (SARS) with some proposed replacement strategies (strategy A and strategy B) for two multi-unit systems. Two numerical examples are provided for a simple illustration of the proposed replacement cost models under SARS, strategies A and B. The results obtained showed that strategy B can extend the optimal replacement time of a series system.


Main Subjects

Volume 4, Issue 2
December 2021
Pages 29-37
  • Receive Date: 05 October 2021
  • Revise Date: 15 March 2022
  • Accept Date: 03 April 2022
  • First Publish Date: 03 April 2022