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Usage-centered design
Usage-centered design is an approach to user interface design based on a focus on user intentions and usage patterns. It analyzes users in terms of the roles they play in relation to systems and employs abstract (essential) use cases〔See Constantine (1995) and Constantine and Lockwood (2001)〕 for task analysis. It derives visual and interaction design from abstract prototypes based on the understanding of user roles and task cases.
Usage-centered design was introduced by Larry Constantine and Lucy Lockwood. The primary reference is their book.〔Constantine and Lockwood (1999); see also Constantine (1996)〕
==Usage-centered design methods==
Usage-centered design is largely based on formal, abstract models such as models of interaction between user roles, UML workflow models and task case and role profiles.
Usage-centered design proponents argue for abstract modelling while many designers use realistic personas, scenarios and high-fidelity prototypes. The techniques have been applied with particular success in complex software projects, some of which have been reported in case studies.〔See, for example, Windl (2002) and Strope (2003)〕
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