To compensate for the inability of the functional descriptions to describe for instance interactions between users and artifacts, the term affordance has been introduced in design methodology by Maier and Fadel. However, some significant details of affordance such as representation, categorization, and application to mechanical design still need to be further studied. Therefore, this paper reviews and compares the use of the term affordance in the fields of Human-Computer Interaction (HCI), Artificial Intelligence (AI), design, psychology, and philosophy. Based on that review, a new categorization scheme of affordances applicable for product design is proposed. The categories including doing and happening Artifact-Artifact Affordances (dAAA and hAAA), doing and happening Artifact-Environment Affordances (dAEA and hAEA), and doing and happening Artifact-User Affordances (dAUA and hAUA) are identified and an initial statistical evaluation is performed to support this proposal. The detailed description of these affordances provides better coverage, more orthogonality, more depth, and could be more usable, eventually meeting the requirements of a taxonomy.

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