基于这些对需要解决的问题和不明确的目标的粗略信息，项目经理会尽最大努力来“猜测”时间日程表和大概成本。

Based on sketchy information about the problems to be solved and vague goals, the project manager does his or her best to "guess" what the schedule and costs will look like.

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你需要架构师的技能去为项目经理评估可行性和成本，并由此确定成本/收益比率。

You need the architect's skills to assess feasibility and costs of features for the project manager to be able to define the cost/benefit ratio.

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项目经理需要针对所定计划去监测正在进行的工作进度，并预测所期待的最终成本。

The project manager then needs to establish what has actually happened as opposed to what was planned and to forecast the expected final costs.

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