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.
因此，这取决于项目经理确保来自所有规程的活动都及时切有效的运行。
It is therefore up to the project manager to make sure that activities from all disciplines are timely and effectively run.
很少有项目经理愿意通过从事于危险的活动而危及他们的职业生涯，除非他们完全相信可以减少风险并且赢利将是丰富的。
Few project managers are willing to endanger their careers by embarking on a risky journey unless they are fully convinced that the risk can be mitigated and the pay-off will be substantial.
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