International Journal of Statistics and Reliability Engineering

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Vol 4, No 1 :

openaccess

Availability Improvement Study of a Two Unit Standby System with Two Types of Repair Facilities

Praveen Gupta , Gurvindar kaur

Abstract

The present paper incorporates statistical analysis of a two-similar unit cold standby system with a substitute system. Reliability, availability, and busy period characteristics are evaluated for the system with three modes and two types of repair facilities. On failure of the system, if system can be repaired in short time then repair is allowed to be continued, otherwise in order to improve availability, another substitute system taken from outside, is used. The substitute system is guaranteed for failure free operation and an expert repairman is called for fast repair of the failed system. Assuming failure and repair times as exponentially distributed, expressions for the mean time to system failure (MTSF), the steady state availability and pdf of busy period for system are derived using linear first order differential equations. A particular case for the proposed system is discussed in which substitute system is not considered. Graphical comparison is also performed to observe the effect of the proposed system on Availability.

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ISSN(P) 2350-0174

ISSN(O) 2456-2378

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