People interact with artifacts, either products or services, in their lives. These interactions are based on two-way communication between people and artifacts. The characteristics of artifacts that induce natural activities of people, affordances, play critical roles in making interactions successful and meaningful. The notion of affordance features, structural elements of artifacts that provide affordances, has been proposed earlier. In this paper, a methodological framework for design for affordances is proposed where repository of affordance features are used. First affordances are identified through function-task interaction matrices or use activity observations. Using affordance feature repository where many alternative structural elements for a specific affordance are stored together with corresponding design constraints and contexts, affordance features for those identified affordances are retrieved considering similarities between the target design constrains and context and those of the affordance features in the repository. Using the clues given by such affordance features, the new affordance feature is to be designed through an analogical reasoning. We present this design for affordance framework as well as an illustrative case where various designers designed affordance features of a tumbler coffee cup using an affordance feature repository.

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