(Q; r) model with Cv aRα of costs minimization

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2017Author
Arias Serna, María Andrea
Puerta Yepes, María Eugenia
Escalante Coterio, César Edinson
Arango Ospina, Gerardo
Arias Serna, María Andrea; Universidad de Medellín
Puerta Yepes, María Eugenia; Universidad EAFIT
Escalante Coterio, César Edinson; Empresas Públicas de Medellín
Arango Ospina, Gerardo; Universidad EAFIT
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In the classical stochastic continuous review, (Q,r) model [18,19], the inventory cost c(Q,r) has an averaging term which is given as an integral of the expected costs over the different inventory positions during the lead time on any given cycle. The main objective of the article is to study risk averse optimization in the classical (Q,r) model using CVaRα as a coherent risk measure with respect to the probability distribution of the demand D on inventory position costs (the sum of the inventory holding and backorder penality cost), for any given (generic) confidence level α∈[0,1). We show that the objective function is jointly convex in (Q,r). We also compare the risk averse solution and some other solutions in both analytical and computational ways. Additionally, some general and useful results are obtained.
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