Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/196904 
Year of Publication: 
2019
Citation: 
[Journal:] Economics: The Open-Access, Open-Assessment E-Journal [ISSN:] 1864-6042 [Volume:] 13 [Issue:] 2019-30 [Publisher:] Kiel Institute for the World Economy (IfW) [Place:] Kiel [Year:] 2019 [Pages:] 1-16
Publisher: 
Kiel Institute for the World Economy (IfW), Kiel
Abstract: 
In this paper, the authors present an EOQ model with substitutions between products and a dynamic inventory replenishment policy. Their key assumption is that many products in the market are substitutable at different levels, and that, in most cases, a customer who discovers that a desired product is unavailable will choose to consume a product with similar attributes or functionality, rather than not purchase at all. Therefore, given a firm that stocks multiple substitutable products, the authors assume that a stock out of one product has a direct impact on other products' demand. The main purpose of our model is to enable inventory managers to develop ordering policies that ensures that, in the event that a specific product runs out and cannot be replenished due to unforeseen circumstances, the consequent increase in demand for related products will not cause further stock out incidents. To this end, the authors introduce a dependency factor, a variable that indicates the level of dependency, or correlation, between one product and another. The dependencies among the various products offered by the firm are embedded into the EOQ formula and assumptions, enabling managers to update their ordering schedules as needed. This approach has the potential to generate more practical and realistic purchasing and inventory optimization policies.
Subjects: 
economic order quantity (EOQ)
optimization
substitute products
dependency factor
reorder point
JEL: 
C44
C51
C61
L60
Persistent Identifier of the first edition: 
Creative Commons License: 
cc-by Logo
Document Type: 
Article

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