The supplier selection and order allocation are two key strategic decisions in purchasing problem. The review presented in this paper focuses on the supplier selection problems (SSP) and order allocation from year 2000 to 2017 in which a new structure and classification of the existing research streams and the different MCDM methods and mathematical models used for SSP will be presented. The review was examined in three aspects: the summaries of the existing evidence concerning the problems, the identification of gaps in the current research to help determine where further investigation might be needed and positioning new research activities.
In this paper, we propose a Decision Support System based on the MUSA method and the continuous genetic algorithm in order to measure job satisfaction. The objective is to help organizations evaluate and measure their employees' satisfaction. Our study is composed of two parts. Firstly, we propose to combine continuous genetic algorithm and the MUSA method in order to obtain a robust solution of good performance. The aim of the development of this algorithm is to verify its efficiency regarding the classical MUSA algorithm. Therefore, we compare the result of continuous genetic algorithm with that of the MUSA algorithm. In the second part, we present our Decision Support Systems called "GMUSA System", it was developed in order to facilitate the applications and the use of the GMUSA tools and overcome the increasing complexity of managerial contexts. Our new system "GMUSA" is applied at the University of Sfax to measure teachers' job satisfaction. Keywords Continuous genetic algorithm • Decision support system • Job satisfaction • MUSA method 1 Introduction Although, job satisfaction was studied widely in psychology, it has no single definition but different opinions about it. Furthermore, it is not clear if there are specific measurement dimensions. The problems concerning a clear definition of job satisfaction lie mostly in the complexity of the topic, the subjectivity and the quality nature of the satisfaction concept (Grigoroudis and Siskos 2009).
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