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自动化与信息科学期刊
SJR: 0.232 SNIP: 0.464 CiteScore™: 0.27

ISSN 打印: 1064-2315
ISSN 在线: 2163-9337

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自动化与信息科学期刊

DOI: 10.1615/JAutomatInfScien.v50.i12.30
pages 34-50

Analysis and Optimization of Models of Queuing-Inventory Systems with Two Types of Requests

Agasi Zarbali ogly Melikov
Institute of Control Systems of National Academy of Sciences of Azerbaijan, Baku
Leonid A. Ponomarenko
International Research and Training Center of Information Technologies and Systems of National Academy of Sciences of Ukraine and Ministry of Education and Science of Ukraine, Kiev, Ukraine
Ismail Alakper ogly Aliyev
Baku State University, Baku (Azerbaijan)

ABSTRACT

Models of queuing-inventory systems with two types of requests, where the request of low priority are accepted only if the current inventory level exceeds a certain critical value, are suggested. It is provided that one of the following replenishment policies can be used, i.e., the two levels policy, the policy of variable order quantity and the policy, when a request of unit size is served after every inventory items issuance. Exact and approximate methods of determination of the system characteristics were developed. The results of numerical experiments of models computations are stated and the problem of their optimization is solved.