Notice of RetractionOptimal inventory policy in a two-level supply chain with delay in payment and stochastic demand

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

This paper investigates the effect of permissible delay in payments on ordering policies in a two-level supply chain with one supplier and one retailer. We relax the assumption of deterministic demand and assume the retailer faces Poisson demand. Transportation times are none-zero constants. Both parties use one-for-one ordering policy. We derive the exact value of the expected cost for the inventory system and obtain the optimal inventory levels. A sensitivity analysis is also performed to explore the effect of key parameters such as credit period, product price and lead-time on expected total cost. Numerical examples are presented with results discussed.