一旦准备进行项目估算，永远都要记住，硬件成本是与变化息息相关的。
Whenever preparing project estimates, always note that hardware costs are subject to change.
成本估算是项目管理中最重要的环节之一。
Cost estimating is one of the most important steps in project management.
计算机软件成本估算是软件工程项目管理的一项重要工作内容。
The software cost estimation is an essential part of the software engineering project management.
软件规模度量是估算软件项目工作量、成本和合理策划项目进度的基础。
Software size measurement is the base of effort estimation, cost estimation and project plan.
未进行成本估算和效益分析就进行软件项目开发，往往会导致项目失控。
The project without cost estimate and benefit analysis is often out of control.
未进行成本估算和效益分析就进行软件项目开发，往往会导致项目失控。
The project without cost estimate and benefit analysis is often out of control.
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