@article { author = {Sajadifar, Mehdi and Pourghannad, Behrooz}, title = {An Integrated Model for a Two-supplier Supply Chain with Uncertainty in the Supply}, journal = {Journal of Industrial and Systems Engineering}, volume = {5}, number = {3}, pages = {154-174}, year = {2011}, publisher = {Iranian Institute of Industrial Engineering}, issn = {1735-8272}, eissn = {2717-3380}, doi = {}, abstract = {The objective of this paper is to study an integrated two-supplier supply chain whose suppliers are unreliable. An unreliable supplier is alternative between available (ON) and unavailable (OFF) states which are considered to be independent exponential variables. The suppliers apply a continuous review policy and the retailer uses an adapted continuous review base on an(R,Q) policy. Transportation times are constant and lead times are non-zero random variables. The retailer faces independent Poisson demands. Using the idea of the one-for-one ordering policy, we implicitly incorporate the distribution function of the random delay for obtaining the value of the expected costs of system. Finally, resorting to a dozen of sample problems, we show that the average cost reduction in our inventory system is at least 3.69% and at most 36.95% comparing to the one with only one supplier.}, keywords = {Supply chain management,Unreliable Supply,Continuous Review Policy,Poisson Demand,Non-Zero Lead-time}, url = {https://www.jise.ir/article_4048.html}, eprint = {https://www.jise.ir/article_4048_34281b5ba5fba63949c2d21fdc8552c8.pdf} }