Scenarios provide an inherently top-down approach to interaction design. They iterate through successively more detailed design structures, from main screens down to tiny subpanes or dialogs.

• 场景剧本提供了一个一致且自上而下的交互设计方法，从主界面到细微的小窗口和对话框，场景剧本反复运用在越来越细致的设计结构上。