The aim of the thesis is twofold. First, a need is exposed for adopting a situated design perspective in designing computer-based tools that support knowledge work. Second, an examination is made of what this perspective may reveal concerning the nature of processes and relations within the design situation. This is done to understand better what it means for users and developers, as well as other stakeholders, to approach and capture the tacit knowing within the work context. The argument for adopting a situated design perspective is based on experience drawn from development projects, as well as literature reviews. In these projects, the design situations encountered are best characterized as explorative and iteratively interpreted. Here,...