In this technical note, an alternative solution procedure to the model that developed is presented. In particular, we take into account the same assumptions, but the total cost function is reformulated, i.e., the step-type discontinuity is replaced by a logistic approximation and the total costs of the system are computed on the whole set of preselected suppliers. Subsequently, we show that the total cost function possesses some properties in terms of convexity and continuity that allow the exploitation of standard constrained nonlinear minimization algorithms. Finally, tests conducted on the same set of problems that originally considered illustrate the good performances of the solution procedure developed in this note.

A note on "A Multiple-Vendor Single-Buyer Integrated Inventory Model With a Variable Number of Vendors"

BRAGLIA, MARCELLO;CASTELLANO, DAVIDE;FROSOLINI, MARCO
2014-01-01

Abstract

In this technical note, an alternative solution procedure to the model that developed is presented. In particular, we take into account the same assumptions, but the total cost function is reformulated, i.e., the step-type discontinuity is replaced by a logistic approximation and the total costs of the system are computed on the whole set of preselected suppliers. Subsequently, we show that the total cost function possesses some properties in terms of convexity and continuity that allow the exploitation of standard constrained nonlinear minimization algorithms. Finally, tests conducted on the same set of problems that originally considered illustrate the good performances of the solution procedure developed in this note.
2014
Braglia, Marcello; Castellano, Davide; Frosolini, Marco
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/435674
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