在项目开始之前、进行期间以及结束之后，这些工件必须始终记在心里，因为它们提供了规划、设计、实施、维护及优化方法参考的要点。
These artifacts must always be at hand before, during and after a project, because they offer a primary point of reference for planning, design, implementation, maintenance, and optimization methods.
介绍了通信工程设计中项目时间管理的组成及实施方法，并结合工程实际详细说明了网络图的绘制要点。
Project time management in communication engineering design is introduced in detail, and critical points on drawing engineering network diagram are presented.
成本控制是项目成本管理的一个重要环节，在项目成本管理实施中最重要的控制要点就是对成本与进度的集成控制。
Cost control is an important component of cost management of the project, of which the most important implementation is to integrated control costs and the progress of the construction.
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