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### Performance evaluation and reliability analysis of a complex system with three possibilities in repair with the application of copula

Nailwal, B.    (Department of Mathematics, Statistics and Computer Science G. B. Pant University of Agriculture and Technology   ); Singh, S.B.    (Department of Mathematics, Statistics and Computer Science G. B. Pant University of Agriculture and Technology  );
• #### 초록

This paper deals with the reliability analysis of a complex system with three possibilities at the time of repair. The considered system consists of two subsystems A and Bin series configuration (1-out-of-2: F). Subsystem A has n units which are connected in series whereas subsystem B consists of n units in parallel configuration. The configuration of subsystem A is of 1-out-of-n: F whereas subsystem B is of k-out-of-n: D and k+1-out-of-n: F nature. System has three states: Good, degraded and failed. Supplementary variable technique has been used for mathematical formulation of the model. Laplace transform is being utilized to solve the mathematical equation. Reliability, Availability, M.T.T.F., Busy Period and Cost effectiveness of the system have been computed. The repairs from state $S_7$ to $S_0$ , $S_8$ to $S_0$ , $S_9$ to $S_0$ and $S_{11}$ to $S_0$ have two types namely exponential and general. Joint probability distribution of repair rate from $S_7$ to $S_0$ , $S_8$ to $S_0$ , $S_9$ to $S_0$ and $S_{11}$ to $S_0$ is computed by Gumbel-Hougaard family of copula. Some particular cases of the system have also been derived to see the practical importance of the model.

• #### 주제어

Reliability .   availability .   M.   T.   T.   F.   .   busy period .   sensitivity analysis .   cost analysis .   supplementary variable technique .   Gumbel-Hougaard copula.

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