The whole process of water supply and drainage projects require cost control and the most important stage is the design phase. In order to strengthen the control of these projects,cost control requires a sound management mechanism, for instance,using quota design,standardized design,limit design,value engineering and etc. Only in this way,can the return on investment be maximized.%给排水项目的造价控制贯穿项目始终，重点在于设计阶段。只有完善相应管理机制，在合理采用优化设计及标准化设计的同时，逐步推行限额设计、价值工程等技术经济方法，才能进一步加强对项目的把控，实现合理控制项目造价的目的，达到投资效益最大化。
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