Fuzzy inventory with backorder for fuzzy order quantity
Information Sciences: an International Journal
Backorder fuzzy inventory model under function principle
Information Sciences: an International Journal
Economic order quantity in fuzzy sense for inventory without backorder model
Fuzzy Sets and Systems
Fuzzy economic production for production inventory
Fuzzy Sets and Systems
Fuzzy inventory without backorder for fuzzy order quantity and fuzzy total demand quantity
Computers and Operations Research
Ranking fuzzy numbers based on decomposition principle and signed distance
Fuzzy Sets and Systems - Special issue on fuzzy numbers and uncertainty
Computers and Operations Research
The Journal of Supercomputing
Supply chain coordination for fuzzy random newsboy problem with imperfect quality
International Journal of Approximate Reasoning
Optimal inventory policy for the fuzzy newsboy problem with quantity discounts
Information Sciences: an International Journal
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The purpose of this paper is to extend [Ouyang, L. Y., Chuang, B. R. (2001). A periodic review inventory-control system with variable lead time. International Journal of Information and Management Sciences, 12, 1-13] periodic review inventory model with variable lead time by considering the fuzziness of expected demand shortage and backorder rate. We fuzzify the expected shortage quantity at the end of cycle and the backorder (or lost sales) rate, and then obtain the fuzzy total expected annual cost. Using the signed distance method to defuzzify, we derive the estimate of total expected annual cost in the fuzzy sense. For the proposed model, we provide a solution procedure to find the optimal review period and optimal lead time in the fuzzy sense so that the total expected annual cost in the fuzzy sense has a minimum value. Furthermore, a numerical example is provided and the results of fuzzy and crisp models are compared.