Analysis of a two-unit cold standby system with instructions for repair given only for one unit per visit of the expert repairman

Abstract

Profit analysis of a two-unit cold standby system with an expert and assistant is investigated. Whenever a unit fails, both the repairmen arrive but the expert repairman may not in a position to devote more time to the system due to his busy schedule in other systems. The expert gives instructions for repair of only one failed unit at a time and then goes back even if second unit fails during his stay. He comes to the system again whenever assistant requires instructions for repair for the other failed unit. Various measures of system effectiveness have been obtained by making use of semi-Markov processes and regenerative point technique. Graphs have been plotted for a special case.