Abstract

Sustainable supplier selection is an essential part of the decision-making process in sustainable supply chains. This choice is focusing on social, economic, and environmental criteria in evaluation of suppliers. Sustainable supplier selection approaches have used both qualitative and quantitative data. Therefore, it is meaningful to use scientific methods that treatment both quantitative and qualitative data, as well as multiple criteria.   Analytical Hierarchy process (AHP) is a one of the important multi-criteria decision –making approaches.  Moreover, Weighted Product Model (WPM) technique is another multi criteria scoring where in this approach, we use the multiplication instead of adding the usual in mathematical operation.  
This paper aims to select the best suppliers using (AHP-WPM) approach which helps decision-makers to reach the best strategy with correct decisions. Using this approach each criterion has its assign weight, which reflects its importance for the process of comparison between alternatives to suppliers. The presented approach consists of the three main steps:  the first step is to identify the criteria used in the comparison process between suppliers, the second step is to identify the decision matrix using AHP and the third step is to construct the WPM matrix and compare between the alternatives, and rank them from the best to the worst through using WPM weights. This work has used the data as in [30] which represents data for company that has four suppliers and five criteria. The results show that the best supplier is the supplier 2 which has weight equal to 0.362. In addition, our work can be extended for future work by integrating with other multi criteria approaches such as TOPSIS, MOORA, etc.