Quality management and competitive advantage are the factors which are effective in promotion of employees' productivity, and its goal is to develop human beings through motivating and expanding standard information. Gaining a unique competitive advantage from the quality of a product can either have the negative or positive impact on the environment of that product and its output. Economic and social changes necessitate the need for continuous improvement in the quality and sustainability of competitive advantage in the environmental industries. The purpose of this study is to investigate the relationship between quality management and environmental management on the competitive advantage of waste management in Shiraz. There are three components of research in this organization. The research method is applied in term of purpose and it is a descriptive-correlative-survey research in term of data collection. We analyzed the path using Laser software. Linear fitness model showed quality management and environmental management as independent variables which were generally fitted with goodness indexes of competitive advantage as a dependent variable. Also, environmental management and quality management are predictive of competitive advantage.
