Summative research is a comprehensive evaluation of a product using representative users and tasks, aimed at assessing the overall usability of the fully developed product. This type of testing typically occurs in the later stages of product development, once the design is substantially finalized. It entails scrutinizing the design against quantitative objectives and, at times, comparing it to competitors’ products. In essence, summative usability testing assesses a product’s usability, considering factors like effectiveness, efficiency, and user satisfaction, with the involvement of representative users and their tasks.
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