Modelling Interactive Systems and Providing Task Relevant Information
This paper presents an approach to the specification of interactive systems which supports reasoning about properties that emerge from the interaction between a system and a user. In particular, properties about the relationship between the information presented by the system and that required by the user in order to perform some task are studied. This gives rise to requirements being placed on the user’s memory for effective use of the system which can be employed to compare different design choices. The techniques and notations are illustrated with a simple example from the domain of desktop office systems.
KeywordsWord Processor External Behaviour User Error Current Word Spelling Checker
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