Sharif University of Technology Scientia Iranica 1026-3098 32 12 2025 05 01 Reliability-redundancy allocation problem of a queueing system considering energy consumption 24169 10.24200/sci.2022.58080.5562 EN Kamyar Sabri-Laghaie Department of Industrial Engineering, Urmia University of Technology, Urmia, Iran. Mahdi Fathi Department of Information Technology and Decision Sciences, G. Brint Ryan College of Business, University of North Texas, Denton, Texas, USA. Journal Article 2021 04 13 In Reliability-Redundancy Allocation Problem (RRAP), the reliability and redundancy of components in a given system configuration are determined while considering some problem-specific constraints. RRAP can be applied in various industries. Moreover, queueing systems are among the most common systems in the manufacturing and service industries. Failure in queueing systems can result in unwanted severe damages. Reliability analysis of queueing systems should be conducted concerning their performance measures. Therefore, a RRAP of a queueing system considering queueing costs is studied in this article. The proposed cost function includes queueing, repair, and energy consumption costs. A Memetic Algorithm (MA) is used to obtain optimal redundancy and failure rates of components and the system’s service rate, which affects the energy consumption level. Extensive numerical experiments and sensitivity analyses are performed to present the problem’s applicability and the proposed algorithm. https://scientiairanica.sharif.edu/article_24169_ab935b81379c7cca9ca701a8fa8650fb.pdf