The performance of the supplier is a crucial factor for the success or failure of any company. Rational and effective decision making in terms of the supplier selection process can help the organization to optimize cost and quality functions. The nature of supplier selection processes is generally complex, especially when the company has a large variety of products and vendors. Over the years, several solutions and methods have emerged for addressing the supplier selection problem (SSP). Experience and studies have shown that there is no best way for evaluating and selecting a specific supplier process, but that it varies from one organization to another. The aim of this research is to demonstrate how a multiple attribute decision making approach can be effectively applied for the supplier selection process.

Decision making is a fundamental tool for managers; enable them to make logical decisions in critical situation between various options. This article concentrates mainly on the seller selection problem, or in some cases it also refers to vendor or supplier selection problem (SSP) and demonstrates how multiple attribute decision making (MADM) methods can be effectively used for vendor selection decision in project management procurement processes and supply chain environment. A case study has been carried out within the two different countries (Sweden and Iran) in order to help managers to choose the best alternatives among their preferences, practically.