This paper describes an empirical study of information systems professionals' productivity perceptions of computer-aided software engineering (CASE) technology.The leading Management Information Systems scholarly and trade journals consistently point out the need for improving the quality of delivered information systems and the productivity of the professionals that produce them.Large enterprises across most industries are investigating and using CASE technology with the hope that it will deliver significant improvements in information systems quality and productivity.Our research investigated productivity perceptions of information systems professionals that use CASE technology.Using a personal computer based survey instrument, CASE technology functions were compared using the method of paired comparison.A rank ordering of the results revealed that Data Flow Diagramming and the Data Dictionary maintenance functions were perceived to be the functions that contributed the most to improving the respondent's productivity.