I am going to develop a ranking system for University libraries. I plan to use 3 criteria for that, Library resources, service quality and user satisfaction. Data for library resources will be collected through a questionnaire from the 10 libraries (librarians) and data for service quality and user satisfaction will be collected trough another questionnaire from library users (100 users from each library) . After collect data which method I can use to rank data? Please give me a soiled answer.   

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