scholarly journals A Scatter Search Algorithm for Multi-Criteria Inventory Classification with Maximize the Satisfaction Level

2021 ◽  
Author(s):  
Ilkay Saracoglu
Keyword(s):  
Inventory Management ◽  
Search Algorithm ◽  
Scatter Search ◽  
Mixed Integer ◽  
Satisfaction Level ◽  
Inventory Cost ◽  
Minlp Model ◽  
Total Inventory ◽  
Scatter Search Algorithm

Abstract Inventory management requires thousands or millions of individual transactions each year. Classification of the items influences the results of inventory management. Traditionally, this is usually classified with considering an annual dollar usage criterion but maybe other criterias such as lead time, criticality, perishability, inventory cost, and demand type can be affected on that classification. The objective of this study is to determine the multi-criteria inventory classification (MCIC) of the inventory items to minimize the total inventory cost and also dissimilarity of classes. Because of the two objectives is considered to solve with together, the maximization of satisfaction level is described to solve the multi-objective problem. This study introduces a Mixed Integer Nonlinear Programming (MINLP) model of the MCIC problem by giving two objectives. A Scatter Search Algorithm (SSA) is used to solve the MINLP model for obtaining high-quality solutions within reasonable computation times. Finally, we illustrate an example and compare our results with other studies in previous literature.

scholarly journals Optimum contributions of hydropower reservoirs to the minimum flow of Vu Gia – Thu Bon river basin

2020 ◽  
Vol 15 (4) ◽  
pp. 1083-1095
Author(s):  
To Viet Thang ◽  
Nguyen T. Thu Nga ◽  
Ngo Le Long
Keyword(s):  
River Basin ◽  
Large Scale ◽  
Search Algorithm ◽  
Scatter Search ◽  
Water Levels ◽  
Electricity Production ◽  
Minimum Flow ◽  
Simulation Based ◽  
Scatter Search Algorithm ◽  
Hydropower Reservoirs

Abstract Upstream hydropower development has a great impact on downstream flows. According to the Regulation of Multi-reservoir Operation in Vu Gia – Thu Bon River Basin (Regulation 15371), four large-scale upstream reservoirs must discharge certain flow during the dry season to increase water levels at downstream hydrological stations named Ai Nghia and Giao Thuy. These stations are used as the control points for the downstream water supply. An optimizing-simulation based model was developed that both maximizes total electricity production and ensures minimum flow downstream as required. A thousand combinations of the reservoir inflows were generated by Monte Carlo simulation, considering the correlation between tributaries. Then, the Scatter search algorithm available in the Optquest module of Crystal Ball was used to find the optimal release from the reservoirs. The results show that the current Regulation 1537 can be improved for more efficient water resources management.

scholarly journals Inventory model for deteriorating items with negative exponential demand, probabilistic deterioration and fuzzy lead time under partial back logging

2020 ◽  
Vol 30 (3) ◽  
Author(s):  
Nabendu Sen ◽  
Sumit Saha
Keyword(s):  
Inventory Management ◽  
Lead Time ◽  
Probability Distributions ◽  
Optimal Strategies ◽  
Inventory Model ◽  
Deteriorating Items ◽  
Optimal Time ◽  
Inventory Cost ◽  
Total Inventory ◽  
Negative Exponential

The effect of lead time plays an important role in inventory management. It is also important to study the optimal strategies when the lead time is not precisely known to the decision makers. The aim of this paper is to examine the inventory model for deteriorating items with fuzzy lead time, negative exponential demand, and partially backlogged shortages. This model is unique in its nature due to probabilistic deterioration along with fuzzy lead time. The fuzzy lead time is assumed to be triangular, parabolic, trapezoidal numbers and the graded mean integration representation method is used for the defuzzification purpose. Moreover, three different types of probability distributions, namely uniform, triangular and Beta are used for rate of deterioration to find optimal time and associated total inventory cost. The developed model is validated numerically and values of optimal time and total inventory cost are given in tabular form, corresponding to different probability distribution and fuzzy lead-time. The sensitivity analysis is performed on variation of key parameters to observe its effect on the developed model. Graphical representations are also given in support of derived optimal inventory cost vs. time.

An advanced scatter search algorithm for solving job shops with sequence dependent and non-anticipatory setups

2015 ◽  
Vol 28 (2) ◽  
pp. 179-193 ◽  
Author(s):  
Miguel A. González ◽  
Camino R. Vela ◽  
Ramiro Varela ◽  
Inés González-Rodríguez
Keyword(s):  
Search Algorithm ◽  
Scatter Search ◽  
Job Shops ◽  
Sequence Dependent ◽  
Scatter Search Algorithm
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