由于工作的特性，大多数项目经理不能客观地判断架构和设计决策。

By the nature of their work, most project managers cannot objectively judge architecture and design decisions.

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架构师的设计、项目经理的计划、编程人员的文档以及测试人员的场景和结果又如何呢？

What about the architect's design, the project manager's plan, the writer's documentation, or the tester's scenarios and results?

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项目经理需要同时对这两个生命周期都比较熟悉，可以通过由一个人来扮演项目经理和方法设计人员两个角色来实现。

The project manager needs to be intimately familiar with both lifecycles, which could be achieved by having the project manager and method designer roles performed by the same person.

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