FROM TASK DOMAIN TO HUMAN- COMPUTER INTERFACE Exploring an Information Mapping Methodology

Human-computer interface designers are able to select from a rapidly increasing number of input/output modalities for a given application. Intuitively, the selection process can be viewed as the mapping of information from the task domain of the artefact to be built onto a set of input/output modalities for this artefact. Inherent to the mapping process is the goal of optimising the representation and exchange of information between user and system during task performance. It might be useful if ways could be found to support optimisation of information mapping. One of the authors has developed a theory called modality theory which provides a theoretical basis of information mapping. The crucial step in applying modality theory to practical interface design is to turn the above, intuitive notion of information mapping into an operational methodology. We have explored this problem in a series of design case studies. The paper reports from the explorations and presents the current version of the information mapping methodology. This version builds heavily on our most recent case study which is an information mapping analysis of the CERD interface. CERD is a flight sequencing tool for use by air traffic control officers. The paper concludes by considering open issues for future work.