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Despite the immense number of papers on green supply chain practices, proposing the most important practices of green supply chain management (GSCM) is less investigated. Consequently, this study aims to provide an incorporated process to find and rank the most important practices of green supply chain management (GSCM) for an empirical case study of Zanjan Sepehr Khodro (SKZ). Firstly, a systematic literature review is conducted to find the major practices of green supply chain management (GSCM). Next, three practices with their sub-criteria have been selected based on their frequency of application. These practices are then categorized based on the major perspectives of green supply chain management (GSCM). Finally, A Fuzzy TOPSIS methodology is applied to rank the green supply chain management (GSCM) practices and find their importance level in corresponding company. According to the results, the final rankings of practices are green recycling, green purchasing and green warehousing respectively. Keywords: Green supply chain management; Green practices; Fuzzy logic; Fuzzy TOPSIS 1. Introduction Today's competitive business environment has imposed many firms to concentrate on supply chain management to earn a competitive advantage. During recent years, green supply chain in the whole supply chain study has become a key strategic topic and thoughtfulness. Regarding the raising global understanding of environmental protection and the corresponding growing regulations, green design, green production, green purchasing, green warehousing, green transportation and the green recycling have become important issues for firms to acquire sustainability [1]. Green supply chain management is a proactive approach to enhance products environmental performance and take into account the environmental regulations requirements as well [2]. Environmentally sustainable issues are getting interested among the companies which are improving their practices in the supply chain management increasingly. Despite the fact environmental regulations and legislation are forcing firms to consider these issues, still, green issues are new and there is a great need to be studied continuously [3].The main objective of this paper is to propose comprehensive and important practices to evaluate the GSCM practitioners using fuzzy TOPSIS. Meanwhile, according to the following literature, there is no study in the area of GSCM framework applying TOPSIS in fuzzy environment. Hence, this is the first research trying to utilize this technique to inspect green practices. The contribution of this paper is briefed as follow: the study has submitted more important green practices based on literature and an expert team for motorcycle manufacturing companies. The most important practices have been highlighted by the applied technique named TOPSIS fuzzy.The rest of this paper is founded as follows. The next section is an overview of GSCM literature. During this section, the study will attempt to draw 20 sub-criteria which are more important indicators and categor...

Firm’s efficiency and competitiveness are two important challenges in today’s global market that have motivated many manufacturing firms to plan novel manufacturing management strategies. Nowadays, simulation models have been used to assess different aspects of manufacturing systems. This paper introduces a welding unit of a manufacturing line of heater production as a case study and the basic application of the ARENA software. The main goal of this paper is increasing the productivity of the production line by using computer simulation. To achieve this goal, three various scenarios are compared and suggested to obtain the better improvement in productivity.