 Stockout risk of production-inventory systems with compound Poisson demands(Ai-Chih) Chang, Jasmine, Haibing Lu and (Junmin) Shi, Jim Omega, 2019, vol. 83, issue C, 181-198 Abstract: Production-inventory systems with continuous production or continuous manufacturing have been implemented in a variety of manufacturing contexts. Most recently, the Commissioner of the FDA has called on drug and biological product manufacturers to begin switching from batch manufacturing processes to continuous production. Motivated by prevailing applications and the emerging and promising landscape in the healthcare and pharmaceutical industries, this paper studies a continuous-review production-inventory system with a constant production rate and compound Poisson demands, in which the cost of the system is assessed via inventory holding, stockout penalty and production costs. For any initial inventory, we derive a closed-form expression for the expected discounted cost function until stockout occurrence. We systemically quantify the stockout risk on four different dimensions (i.e., time, volume, frequency and percentage) and derive explicit expressions for each type of risk metric. The objective is to derive the production rate that minimizes the expected discounted system cost subject to a given risk tolerance level on stockouts. With the aid of the derived explicit forms of stockout risk and the cost function, we develop a computationally-efficient algorithm for the optimal solution. Extensive numerical studies are conducted to illustrate our results with rich insights. Numerically, we show that it is outrageously costly to reduce stockout risk, especially when this risk is relatively low; the value of risk is more sensitive to the stockout risk level if the demand distribution has a higher volatility. Keywords: Pharmaceutical manufacturing; Drug shortage; Production-inventory systems; Continuous manufacturing; Continuous production; Stockout risk; Risk metrics (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:jomega:v:83:y:2019:i:c:p:181-198 Ordering information: This journal article can be ordered from DOI: 10.1016/j.omega.2018.03.001 Access Statistics for this article Omega is currently edited by B. Lev More articles in Omega from Elsevier |
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