A copula-based analysis for examining and enhancing performance of serial system

Ibrahim Yusuf, Ramatu Idris Gatawa, Mansur Hassan and Muhammad Salihu Isa

International Journal of Process Management and Benchmarking, 2025, vol. 19, issue 1, 108-130

Abstract: This study investigates the performance of a serial system consisting of five dissimilar subsystems A, B, C, D and E employing Copula's attributes for estimation. Subsystem A has six units working as 4-out-of-6, subsystems B, C and E possess each has one unit while subsystem D has three units working in active parallel. The system experiences partial and complete malfunction during operation: partial malfunction leads the system into reduced capacity mode, and a complete malfunction resulting in system failure. The research employs the technique of supplementary variable and transforms of Laplace to establish and solve the governing differential equations corresponding to schematic system's diagram. Performance models for the system such as profit, MTTF, availability, sensitivity of MTTF and reliability are numerically validated and presented through tables and graphs. The research findings are highly valuable for evaluating performance, identifying ideal system designs, and developing workable maintenance plans. The research contributes to enhancing system performance, increasing production output, and improving revenue mobilisation in various application domains.

Keywords: performance; profit; reliability; mean time to failure; MTTF; availability. (search for similar items in EconPapers)
Date: 2025
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