We all know that data is very important in decision making processes, and also it's obvious that row data can not lead to a precise decision.
Operations Research (OR) can help transform the data to useful information by which accurate decisions can be made. Decision Support Systems are good examples in which this transformation and process of making accurate decisions occur.
Health care problems have attracted too much attention and researchers are using OR tools to solve them.
Now a critical question is: What are the main trends of using operations research tools in healthcare problems?