A Parallel System with Priority to Preventive Maintenance over Replacement Subject To Maximum Operation and Repair Times

  R. Rathee ,  S.C. Malik

The present study deals with profit analysis of a parallel system of two identical units by giving priority to preventive maintenance of one unit over replacement of the other. Each unit has two modes- operative and complete failure. A single server is provided immediately to conduct the repair activities whenever needed. The preventive maintenance of the unit is done after a maximum operation time up to which no failure occurs. The failed unit is replaced by new one in case its repair is not possible by the server in a given maximum repair time. The unit performs with full efficiency as new after repair and preventive maintenance. All random variables are statistically independent. The distributions for failure time, replacement time and the rate by which unit undergoes for preventive maintenance are taken as negative exponential while that of preventive maintenance, repair and replacement rates are assumed as arbitrary with different probability density functions. The semi-Markov process and regenerative point technique are adopted to derive the expressions for some measures of system effectiveness in steady state. The variation of mean time to system failure (MTSF), availability and profit function has been observed graphically for arbitrary values of various parameters and costs.

Keywords- Parallel system, preventive maintenance, replacement, priority and profit analysis.

Unique Identification Number - IJEDR1403063
Page Number(s) - 3199-3206
Pubished in - Volume 2 | Issue 3 | Sept 2014
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  R. Rathee ,  S.C. Malik ,   "A Parallel System with Priority to Preventive Maintenance over Replacement Subject To Maximum Operation and Repair Times", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.2, Issue 3, pp.3199-3206, Sept 2014, Available at :http://www.ijedr.org/papers/IJEDR1403063.pdf