There are several models for development of the requirements that drive an iterative development project.

对驱动一个迭代式开发项目的需求开发来说存在着数个模型。

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Each model is the result of many years of development with organizations worldwide to construct large enterprise models that may then be used to drive project efforts along a common path.

每个模型都是全球多个组织为构建大型企业模型而进行多年的开发的结果，然后通过这些大型企业模型凝聚项目开发的力量。

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Obtaining complete requirements — and accurate visual models — in the early days of a project is critical for achieving success in later stages of the development lifecycle.

在开发周期的早期阶段获得完整的需求和精确的可视化模型，是项目取得成功的关键。

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