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On the cost of capital in inventory models with deterministic demand

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  • Serrano, Alejandro
  • Oliva, Rogelio
  • Kraiselburd, Santiago

Abstract

In the operations management literature, the financial risk in an inventory model is usually assumed to be captured by the (constant) weighted average cost of capital (WACC) of the firm. This assumption is, at best, an approximation, since this cost depends on the risk of the cash flows, which, in turn, depends on the inventory policy. We investigate what the right cost of capital should be in an inventory model with deterministic demand. To do so, we study an inventory model with a generic inventory cost function where risk depends on the inventory decision made. Additive and multiplicative financial noise functions are included to assess the impact of these on both the cost of capital of the firm and the optimal inventory policy. We find that, in contrast to previous models, risk is not in general a monotone function of inventory. Also, a rate close to the risk-free rate, which typically deviates significantly from the WACC, should be used to value inventory-related investments when the inventory cost function is dominated by holding cost for large order quantities, even if investments are subject to other sources of financial variability.

Suggested Citation

  • Serrano, Alejandro & Oliva, Rogelio & Kraiselburd, Santiago, 2017. "On the cost of capital in inventory models with deterministic demand," International Journal of Production Economics, Elsevier, vol. 183(PA), pages 14-20.
  • Handle: RePEc:eee:proeco:v:183:y:2017:i:pa:p:14-20
    DOI: 10.1016/j.ijpe.2016.10.007
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    References listed on IDEAS

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    Cited by:

    1. Mária Stopková & Ondrej Stopka & Vladimír Ľupták, 2019. "Inventory Model Design by Implementing New Parameters into the Deterministic Model Objective Function to Streamline Effectiveness Indicators of the Inventory Management," Sustainability, MDPI, Open Access Journal, vol. 11(15), pages 1-15, August.
    2. Bian, Yuan & Lemoine, David & Yeung, Thomas G. & Bostel, Nathalie & Hovelaque, Vincent & Viviani, Jean-laurent & Gayraud, Fabrice, 2018. "A dynamic lot-sizing-based profit maximization discounted cash flow model considering working capital requirement financing cost with infinite production capacity," International Journal of Production Economics, Elsevier, vol. 196(C), pages 319-332.

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