Based on the project construction practice of letan hydropower station , the paper expatiates the important significance on bringing down hydraulic power construction cost and improving investment efficiency from a few key points of project investment control in the construction stage 摘要通过对乐滩水电站工程建设实践，该文从水电站工程建设阶段工程投资控制的几个关键环节来阐述对降低水电工程造价、提高投资效益的重要意义。
This paper discusses the optimum in the design : the in uestment in metro construction ; the quality control project management and the design interface , argues this discussion will be helpful for the requirements of planning and environment protection 结合地铁工程特点，介绍了从投资控制、质量控制、项目管理以及工程接口管理等几方面实行地铁设计技术质量管理的实践，以达到“规划满意、环保满意、业主满意” ，实现地铁工程设计创优。
In this paper , basis on this phenomenon , from the aspects of method , regulation and computer decision support of investment control , a complete system on control investment in the period of design is established by application of ve , quota design and lcc theories 本文针对这一现象，从投资控制的方法、制度和计算机辅助决策支持三方面着手，运用价值工程、限额设计、寿命周期费用分析理论，试图建立一整套设计阶段投资控制的完整体系。
Basis on study of investment control mechanism in edsign phase , solution and suggestion to improve investment control in design , expert decision support system for comprehensive assessment of sc heme is built , which improve the investment control method 在对设计阶段投资控制机制研究的基础上，提出了改善设计阶段投资控制的对策和建议。为了提高设计阶段投资控制的工作效能，作者尝试构建了方案评价专家辅助决策系统，有利于增强投资控制方法的可操作性。
