INTERNATIONAL JOURNAL OF ENGINEERING, SCIENCE AND - Volume 6, Issue 3, July 2017

Pages: 181-188

Date of Publication: 01-Jul-2017

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ANALYSIS OF DEGRADED MACHINING SYSTEM WITH STANDBY SWITCHING FAILURES

Author: Purushottam Jharotia and D. C. Sharma

Category: Engineering, Science and Mathematics

Abstract:

This paper studied the repairable system with M operating machines, S warm standby machines and R heterogeneous servers where warm standby machines have switching failure probability q. Once all spares are utilized, system starts working under degraded mode due to load sharing. It is assumed that failure and repair times of the machines follow the exponential distribution. Steady state probability is evaluated using successive over relaxation (SOR) technique. A cost model is developed in order to obtain the optimum number of repairmen and spare machines maintaining the system availability at minimum specified level. We performed sensitivity analysis under optimum operating conditions.

Keywords: Degraded failure; Switching failures; Common cause failure; Repairable system; Sensitivity analysis.