The application model then is progressively elaborated upon until finally deployment occurs.

然后再逐步阐述该应用程序模型，直到最后部署开始。

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When properly defined, the scope of the project-the work to be done-should be controlled as the project and product specifications are progressively elaborated.

如果项目范围即需要完成的任务，规定得恰如其分，则即便是在产品技术要求说明书的逐步完善过程中，项目范围仍应保持控制状态。

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These characteristics will generally have less detail in early phases and more detail in later phases as the product characteristics are progressively elaborated.

这些特征通常在早期阶段不够详细，而在以后的阶段，随着产品的特征逐步明确，产品范围说明书也就逐步详细起来。

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