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A methodology for stochastic inventory models based on a zero‐adjusted Birnbaum‐Saunders distribution
Author(s) -
Leiva Víctor,
SantosNeto Manoel,
Cysneiros Francisco José A.,
Barros Michelli
Publication year - 2015
Publication title -
applied stochastic models in business and industry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.413
H-Index - 40
eISSN - 1526-4025
pISSN - 1524-1904
DOI - 10.1002/asmb.2124
Subject(s) - estimator , zero (linguistics) , econometrics , distribution (mathematics) , computer science , probability distribution , statistics , mathematics , economics , mathematical analysis , philosophy , linguistics
The Birnbaum–Saunders (BS) distribution is receiving considerable attention. We propose a methodology for inventory logistics that allows demand data with zeros to be modeled by means of a new discrete–continuous mixture distribution, which is constructed by using a probability mass at zero and a continuous component related to the BS distribution. We obtain some properties of the new mixture distribution and conduct a simulation study to evaluate the performance of the estimators of its parameters. The methodology for stochastic inventory models considers also financial indicators. We illustrate the proposed methodology with two real‐world demand data sets. It shows its potential, highlighting the convenience of using it by improving the contribution margins of a Chilean food industry. Copyright © 2015 John Wiley & Sons, Ltd.