eses) is not easy to apply to the topic of strategic information systems. Strategic studies are essentially about the long term, and hence longitudinal studies are highly desirable. Moreover, because of the extent to which multiple perspectives and interpretations are involved, triangulation is important, and data may in many cases have to be drawn from less formal sources not commonly used in formal research. Other problems arise because many of the organisations of interest to researchers are not only large and complex, but also comprise multiple business units. Care must therefore be taken that the appropriate level of aggregation is selected. With the gradual maturation of the topic of strategic information systems, increased attention is being paid to research methods, and several important papers now take a more carefully considered approach than was possible during the early, anecdote-based phase (Bakos & Treacy 1986, Sager 1988, Sethi 1988, Venkatraman 1989, Clemons & Weber 1990a, Reich & Benbasat 1990, Broadbent & Weill 1991, Chan & Huff 1992, Angle et al 1993). It is to be expected that further developments and refinements in research methods will emerge during the next few years. ConclusionsStrategic information systems is a topic which is very important, and highly dynamic. This paper has presented an interpretation of the emergence and development of theory in the area, and of current and emerging themes. Particularly significant tensions exist between the relevance of research outcomes and the rigour of research processes, and the literature must be used with an especially critical eye. Organisations seek to gain significant advantages by employing SIS to alter the internal structure or the entire industry structure. Several frameworks exist which are intended to assist understanding of the use of SIS based on the industry organisation, value chain, and strategic thrusts. Organisations seek competitive advantages over oth...
