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Optimal ordering policy for stock-dependent demand under progressive payment scheme. (English) Zbl 1152.90321

Summary: A mathematical model is developed to formulate optimal ordering policies for retailer when demand is partially constant and partially dependent on the stock, and the supplier offers progressive credit periods to settle the account. The notion of progressive credit period is as follows:
If the retailer settles the outstanding amount by \(M\), the supplier does not charge any interest. If the retailer pays after \(M\) but before second period \(N\) offered by the supplier, then the supplier charges the retailer on the un-paid balance at the rate \(\text{Ic}_{1}\). If the retailer settles the account after \(N\), then he will have to pay at interest rate \(\text{Ic}_{2}\) on the un-paid balance (\(\text{Ic}_{2} > \text{Ic}_{1})\). The cost minimization is considered to be an objective function.
An algorithm is given to find the flow of optimal ordering policy. A numerical illustration is given to study the effect of various parameters on ordering policy and total cost of an inventory system.

MSC:

90B05 Inventory, storage, reservoirs
91B42 Consumer behavior, demand theory
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