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Thiết kế trải nghiệm người dùng iphone - p 18

Nguyên mẫu có thể giúp bạn giải quyết vấn đề thiết kế, thẩm định thiết kế, và truyền đạt ý tưởng thiết kế. Những hoạt động này lên phía trước cũng có thể đẩy nhanh quá trình phát triển, tiết kiệm thời gian và tiền bạc. | Why Prototype Prototypes can help you solve design problems evaluate designs and communicate design ideas. These up-front activities can also expedite the development process saving valuable time and money. The most common estimate is that it s 100 times cheaper to make a change before any code has been written than it is to wait until after the implementation is complete. Jakob Nielsen2 SOLVE DESIGN PROBLEMS Prototypes can be an efficient way to work through design problems before getting deep into coding. They can help address everything from higher-level conceptual issues to lower-level interactions. For example imagine that you re creating a messaging app that will display a transition when users move messages from one folder to another What is the optimal speed of the transition What is the best form for the visual feedback How do these two elements work together Storyboards with directional arrows could illustrate the general concept but an interactive prototype would be more effective at fine-tuning the solution. EVALUATE DESIGN IDEAS Prototypes are often used to evaluate design ideas concepts flows and interactions before investing development time. Evaluators may include the designer design colleagues and of course end users. Internal reviews can take a critique format or employ user-centered design methodologies such as heuristic evaluation as discussed in Chapter 5 Evaluating the Competition. Although internal reviews are tremendously valuable they are no replacement for usability testing which will be discussed in Chapter 8 Usability-Testing App Concepts. COMMUNICATE DESIGN IDEAS Often prototypes are the only way to effectively communicate your app idea. In particular apps that interact with the real world location-aware apps bar-code-scanning apps voice recorders must go beyond static screen designs to truly tell their stories. They need context the people places and objects that are an integral part of the app.3 Similarly immersive apps such as .