在图3中的四个阶段——先启、精化，构建以及产品化——中，主要关注于不同类型风险的减轻。
Each of the four phases shown in Figure 3 — Inception, Elaboration, Construction and Transition — focus on mitigating different types of risks.
在一个项目先启阶段中，应集中关注于降低风险和不确定因素，这是使用RUP优于使用其他迭代化方法的重要优势。
The focus on reducing risks and uncertainties early in a project is one of the key advantages of using RUP over other iterative methodologies.
它们大多数发生在过程中的先启和精化阶段。
Most of them take place in the Inception and Elaboration phases quite early in the process.
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