上活夫通大事 e SHANGHAI JIAO TONG UNIVERSITY Pros and cons The team lists the strengths and weaknesses of each concept and makes a choice based upon group opinion. Prototype and test The organization builds and tests prototypes of each concept,making a selection based upon test data. Decision matrices The team rates each concept against prespecified selection criteria,which may be weighted.Pros and cons : The team lists the strengths and weaknesses of each concept and makes a choice based upon group opinion. Prototype and test : The organization builds and tests prototypes of each concept, making a selection based upon test data. Decision matrices : The team rates each concept against prespecified selection criteria, which may be weighted. All Teams Use Some method for choosing a concept