In supply chain management, supplier performance is evaluated based on several criteria. In this paper, a fuzzy multi-objective mathematical programming model is presented to consider different qualitative and quantitative factors to choose appropriate suppliers and the optimal order quantity allocated to them. The proposed study uses analytical hierarchy process to rank different suppliers and a fuzzy multi-objective mathematical programming is presented to choose the best suppliers. The study uses NSGAII to solve the resulted problem and the model is analysed using some sample results under various circumstances. The study considers different Pareto solution set obtained by TOPSIS ranking algorithm, and eventually determines the best possible solutions.

During the past few decades, there have been different studies on e-business but there are limited numbers of works accomplished on measuring the impact of e-business on supply chain. Although e-business may not directly influence on organizational performance, it can have significant indirect impact on unifying customers and suppliers, which yields to a better performance of organizations. In this study, we perform an empirical study to measure the indirect impact of e-business on organizational performance. The proposed study of this paper designs a questionnaire and distributes it among 40 professional experts in various industries in province of Ilam, Iran. The survey examines four hypothesis for a possible correlation between e-business and integrated suppliers, e-business and customers, integrated customers and suppliers with organizational performance. The results of this survey confirm a positive relationship between all these components either directly or indirectly.

The aim of this research is to analyze the role of the staff’s wellbeing stated as independent variable and the work locus of control as the moderator factor associated with the organizational commitment and the staff’s wellbeing. To accomplish the objective, we used regression analysis. The research focuses on the one’s ability to predict the staff’s wellbeing and it studies the effects of the work locus of control as a moderator on the organizational commitment. Findings of the research show that the staff’s wellbeing maintains a negative relationship with the continuance commitment and a positive relation with the affective and normative commitments. Moreover, the impact of the work locus of control, as moderator, on the relationship between the staff’s wellbeing and their organizational commitment relational and has some necessities. Thus, the findings of the research are in a state of continual changes.