The understanding and development of computer-based information systems relies upon the extensive use of models of human cognition, computer systems and social activity. The development of a range of models in each of these areas represents considerable progress in explaining how information and communication technologies (ICTs) can be used to develop complex systems to support organizations. The fragmented nature of current understanding, however, limits the extent to which approaches to systems development can be improved. Applying many models to different elements of design, for example, does not guarantee that the elements, when combined, will function as an effective system. The framework presented here enables an integrated approach to be taken to modeling and developing human-computer systems. The framework is of both practical and academic interest, serving as an aid to design and addressing the substantive theoretical issues involved in reconciling current perspectives. INTRO...

This paper presents a case in favour of developing integrated theories of information systems. It argues that such theory development can provide a number of benefits to the IS community through the increased unification of its language and the development of a theoretical core. Two candidate theories are then examined to illustrate how the claimed benefits might arise.