项目经理可能想改进对于未来新的和维护开发活动的估计。

A project manager may want to improve estimation for future new and maintenance development activities.

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工作于Site a的项目经理负责维护发行，她得到一个发给她的新需求的email通知。

The project manager responsible for the maintenance release, who also works at Site a, gets an E-mail notifying her of the new requirement.

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出于好奇，项目经理查看了Web站点的历史，以便查明是否有特殊原因导致该站点难于进行维护。

Out of curiosity, the project manager looked into the history of the Web site to see if there was a particular reason for the site being so difficult.

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