Cost-Benefit Analysis of a Cold Standby System with Preventive Maintenance and Repair Subject to Inspection

Sudesh K. Barak, M.S. Barak and S.C. Malik

Abstract: A cold standby system of two-identical units is studied under the aspects of preventive maintenance and repair. Each unit has two modes- normal and complete failure. There is a single server who visits the system immediately to carryout repair activities. The server conducts preventive maintenance of the operative unit after a pre-specific time ‘t’. The failed unit undergoes for inspection to see the feasibility of its repair. If repair of the unit is not feasible, it is replaced immediately by new-one. The random variables are statistically independent. The unit works as new after preventive maintenance and repair. The failure time and time by which unit undergoes for preventive maintenance follow negative exponentially distribution while the distributions for inspection and repair times are taken as arbitrary with different probability density functions. The semi-Markov process and regenerative technique are adopted to derive the expressions for several reliability measures. The trend for MTSF, availability and profit function have been observed graphically for arbitrary values of various parameters and costs.

Keywords: Cold standby system, preventive maintenance, inspection, repair, replacement, cost-benefit analysis.

Pages: 274 – 285 | Full PDF Paper