Optimal lot sizing, process quality improvement and setup cost reduction
Operations Research
The mean value of a fuzzy number
Fuzzy Sets and Systems - Fuzzy Numbers
A subjective approach for ranking fuzzy numbers
Fuzzy Sets and Systems
Theory and Practice of Uncertain Programming
Theory and Practice of Uncertain Programming
Expected value operator of random fuzzy variable and random fuzzy expected value models
International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems
Uncertainty Theory
Expected value of fuzzy variable and fuzzy expected value models
IEEE Transactions on Fuzzy Systems
Computers and Industrial Engineering
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This paper presents a random fuzzy economic manufacturing quantity (EMQ) model in a deteriorating process. It is assumed that the setup cost and the average holding cost are characterized as fuzzy variables and the elapsed time until shift is a random fuzzy variable. As a function of these parameters, the average total cost is also a random fuzzy variable, and the unimodality of its expected value is studied. To obtain the optimal run length and the minimum average cost, simultaneous perturbation stochastic approximation (SPSA) algorithm based on random fuzzy simulation is provided. Random fuzzy EMQ models with fuzzy deterioration, fuzzy linear deterioration and fuzzy exponential deterioration are presented, respectively. These models can be solved by the proposed algorithm. Numerical examples are presented in the end.