To be able to compete in the domestic plastic industry, small and medium-sized enterprises producing plastic need to proactively find the supply of raw materials, avoiding shortages like in the previous years. Purchasing is extremely important and will create a competitive advantage with competitors in the market, so finding suppliers will determine the success in the later stages of the production chain. With the development of the current information system, selection and evaluation have become important in order to achieve effective decision-making through optimal options. In this study, the authors provide a new approach for decision-makers in evaluating and selecting suppliers, which is formulated based on the supply chain operation reference (SCOR) model, fuzzy analytic network process (FANP), and VIseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR). The contribution of this research is to propose a multicriteria decision-making model (MCDM) for raw material supplier selection in the plastic industry. This research also provided a useful guideline for supplier selection in other industry.Mathematics 2019, 7, 981 2 of 17 avoiding subjective factors such as human factors, documents, relationships, etc., that is vague and incomplete in making decisions is crucial [4]. Moreover, most previous studies have assumed that each criterion cluster in the method they use has equal weight to solve the problem with a weighted hyper matrix [5,6]. Therefore, previous studies have not exploited the advantages and disadvantages of the models or methods they have applied. With the development of the current information system, selection and evaluation have become important to achieve effective decision-making through optimal options [7].According to the Vietnam Plastics Association (VPA), each year, Vietnam's plastic industry needs about 5 million tons of plastic materials and hundreds of additives, while domestic production can only supply about 900,000 tons of raw materials/year. According to the data from the General Department of Customs, Vietnam must import 4.54 million tons of plastic materials worth nearly $6.3 billion, up 15.7% over the same period.The reliance on imported plastic materials not only causes businesses to stagnate capital because of stockpiling raw materials, but also has potential risks on exchange rates and world oil prices. Every time the VND/USD exchange rate increases, input costs of plastic businesses will increase accordingly.The primary goal of this research is to propose a multi criteria decision-making model (MCDM) for raw material supplier selection in plastic industry and also provide a useful guideline for supplier selection in other industry.In this study, the proposed model provides a new approach for decision-makers in evaluating and selecting suppliers, which is formulated based on the supply chain operation reference (SCOR) model, fuzzy analytic network process (FANP), and VIseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR).This paper provides research background, moti...