Proceedings of the International Conference on Industrial Engineering and Operations Management Pilsen, Czech Republic, July 23-26, 2019 © IEOM Society International Selection of a Biomass Product using a Hybrid Approach of BW-PROMETHEE Mahdi Bastan School of Industrial Engineering, College of Engineering University of Tehran Tehran, Iran bastan@ut.ac.ir Peyman Kiani Nahand School of Industrial Engineering, College of Engineering University of Tehran Tehran, Iran kiani.n.peyman@ut.ac.ir Samaneh Korlou and Mahdi Hamid School of Industrial Engineering, College of Engineering University of Tehran Tehran, Iran s.korlou@ut.ac.ir, m.hamid31400@ut.ac.ir Abstract The selection of suitable biomass is an important stage in the generation of biofuels, which has a significant impact on the quality of biofuels. The selection of biomass is a strategic decision and, considering with the selection of the raw material for the generation of suitable biomass is influenced by various social, economic and environmental factors, it turns into a multi-criteria decision-making (MCDM) problem. By reviewing the literature in this paper, we identify the important criteria of suitable seed oil which includes 16 social, economic and environmental criteria and three options for soybean, rapeseed (colza) and cotton for the generation of biomass. Then we use a hybrid approach to determine the weight of the criteria and ranking the alternatives so we first determine the weight of the criteria using the Best-Worst (BW) method. Then we rank with PROMETHEE GAIA method the alternatives and analyze the model. Keywords Best-Worst Method, PROMETHEE, Biomass, MADM, Seed Oil 1. Introduction Over the past decades, research and development of alternative fuels, including biofuels, has been increased because of reducing fossil fuels, energy security and the impact that fossil fuels have on the environment, such as greenhouse gas emissions. Biofuels are sustainable renewable energy sources that can reduce the environmental impact of fossil fuels. Biomass is the primary source of bioenergy and biofuels, bioethanol and biodiesel are among of most important biofuels. That this study focuses on biodiesel production. After the 1970s oil crisis, many countries started planning to use more biofuels to reduce dependence on fossil fuels (Timilsina and Shrestha, 2011), for example, in Iran, according to the perspective document, by the year 2025, 20 1828