For constructing workflow model from initial requirement, a scenario-driven model design approach is put forward.

针对从初始需求出发逐步构造工作流模型的问题，提出了一种场景驱动的模型设计方法。

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Scenario-Driven Development The whole cannot be defined without understanding the parts, and the parts cannot be defined in detail without understanding the whole.

场景驱动的开发 在不了解局部的情况下，不能确定整体，而在不了解整体的情况下，不能详细确定局部。

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The xp experience was highly valuable, and dramatically changed our view of how to deliver software, particularly with regard to scenario-driven development and testing.

XP的经验是非常有价值的，并且戏剧性的改变了我们对如何交付软件的看法，特别是关于场景驱动的开发和测试。

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