Background and Aim: Purchasing hospital equipment is one of the most important decisions made by managers and health professionals. Gray systems theory is an approach to deal with issues under uncertainty conditions where decision makers are facing a small number of unspecified data. The purpose of this paper is to apply the gray theory for the purchase of anesthesia machine .
Materials and Methods: This study was a survey in which mathematical analysis was used. Data collection devices included documents, interviews and questionnaires. In order to solve multiple criteria decision making in uncertain conditions, a model based on gray system theory was used. Data analysis was performed using Excel software.
Results: The findings show that among anesthetic equipment bought by public and private hospitals, brand A is superior to other brands. However, the gray possibility degree for the other brands is significantly different from brand A.
Conclusion: In addition to helping to purchase anesthetic equipment for hospitals, the results of this study are also useful for companies manufacturing medical equipment to evaluate their situation in terms of the studied criteria and take appropriate measures to develop their strengths and improve their weaknesses.
