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

Document Type : Review Article


1 Department of Mathematics, Federal University Dutse

2 School of Continuing Education, Bayero University Kano, Nigeria.


Among all systems, the series system is having the lowest optimal replacement time, while the parallel system is having the greatest optimal replacement time. This paper is comparing the standard age replacement strategy (SARS) with two newly introduced strategies (strategies A and B) for some multi-unit systems, so as to investigate the advantages of each of the three strategies (SARS, strategy A and strategy B). For simple illustration of the proposed replacement cost models under SARS, strategy A and strategy B, two numerical examples were provided, and the results obtained will be important to engineers, maintenance managers and plant management, in selecting and applying the best strategy for preventive maintenance of a particular multi-unit system.


Main Subjects

Articles in Press, Accepted Manuscript
Available Online from 03 April 2022
  • Receive Date: 05 October 2021
  • Revise Date: 15 March 2022
  • Accept Date: 03 April 2022
  • First Publish Date: 03 April 2022