At least two perspectives of design activity are consistent with the action-centric perspective. The two involve 3 undemanding activities.
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A layout process is a general philosophy which can or may not comprise a guide for specific methods. Some are to steer the overall goal of the design. Other systems are to guide the traits of the designer.
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In the reflection-in-action paradigm, designers alternate among "framing", "making moves", and "evaluating moves". "Framing" refers to conceptualizing the problem, i.e., defining aims and objectives. A "move" is a tentative layout decision. The analysis procedure may result in added moves in the design.
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The rational model was independently developed by Herbert A. Simon,[8][9] an American scientist, and two German engineering design theorists, Gerhard Pahl and Wolfgang Beitz
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In the sensemaking–coevolution–implementation framework, designers trade between its 3 titular activities. Sensemaking comprises the two framing and evaluating moves. Implementation is the method of making the layout object. Coevolution is "the method where the layout agent concurrently refines its intellectual photograph of the design object in accordance with its mental photograph of the context, and vice versa"
