Ranking of hospital waste disposal outsourcing companies with the new fuzzy multiple criteria decision-making hybrid method and grey

Ensuring the disposal of hospital waste is a major challenge for hospital waste management. the outsourcing process waste disposal can be a good alternative. The aim of this study is to select a company to outsourcing waste disposal to the hospital To help right decision making for managers. The research in terms of purpose is applied and the way of doing is descriptive-exploratory. The research community of Ministry of Health and Medical Education experts is about 10 people. By reviewing the theoretical literature, the most important criteria were identifing an screened by experts and Fuzzy Delphi method. Then The combined method of analytical network process based on fuzzy DEMATEL was used to determine the relationships and weights of the criteria, and the modified Grey Relational Analysis method was used to rank the companies. The results of analyzing the data collected through questionnaire and DEMATEL method showed that "financial" criteria is influencing and "serviceability" influenced for success in the outsourcing process. The "service accountability" sub-criterion has the highest weight and the first priority.