At least two perspectives of layout activity are per the action-centric perspective. Both contain 3 common activities.
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A design process is a widespread philosophy which may or won't include a aid for specific methods. Some are to lead the overall target of the design. Different procedures are to lead the traits of the designer.
In the reflection-in-action paradigm, designers alternate between "framing", "making moves", and "evaluating moves". "Framing" refers to conceptualizing the problem, i.e., defining aims and objectives. A "move" is a tentative design decision. The evaluation process might lead to added moves within 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 comparing moves. Implementation is the method of creating the design object. Coevolution is "the approach in which the design agent simultaneously refines its mental image of the design item based on its intellectual picture of the context, and vice versa"