A Family of Experiments to Analyze Differences among Unstructured Interviews, JAD and Prototyping

Next we describe each variable:
-Team: Id of the team (experimental unit)
-Number of functional requirements
-Number of non-functional requirements
-Number of functional requirements + non-functional requirements
-Time to prepare the interview
-Time in the interview
-Time to prepare the requirements document
-Overall time
-Diversity
-Completeness
-Quality
-Number of questions
-Number of relevant questions
-Efficiency (quality time ratio)
-Treatment: among unstructured interviews, JAD and Prototyping
-Replication: id of each repication