Question
The key principles behind the human-centered design system as explained in The Design of Everyday Things are: Observation, Idea generation, Prototype, and Test. Observation involves observing people as they use products and behave normally to understand the nature of a problem. Idea generation is the stage where creativity is critical, and a lot of ideas are generated without regard for constraints. The Prototype stage involves building a quick prototype or mock-up of each potential solution to test its feasibility. The Test stage involves gathering a person or group of people as closely resemblant to the target demographic as possible to test the designed product.
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Observation — this form of design research involves simply observations of people as they use products and behave as they normally would. The goal is to understand the nature of a problem Idea generation — creativity is critical at this stage. Norman recommends to generate a lot of ideas, create without regard for constraints, and question everything Prototype — the only way to really know if an idea is reasonable is to test it. Build a quick prototype or mock-up of each potential solution Test — gather a person or group of people as closely resemblant to the target demographic as possible to test the thing you have designed. Norman recommends to study five people individually; then, when those tests have been analyzed, study five more people individually, and so on
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