Computerization has allowed branching and other logic to be integrated into questionnaire administration. The primary purpose of this invention is to allow the functionality and power of these processes to be easily created, and more importantly, customized by users of data collection systems. Rather than one set of logic applying to all users, this invention can be integrated into any computerized questionnaire application and generates a plurality of individualized questionnaires. The system allows and limits each user's customization of logic rules while providing transparent integration that allows different users to select the same questionnaire or battery of questionnaires, but receive overlapping, yet different questions and logic.