Value analysis is an edge tool of decreasing cost in a new product development by a branch of Technical Economy, especially in designing phase. It is applying widely.

价值分析作为技术经济的一个分支，在新产品开发设计阶段被视为降低成本的利器，得到越来越广泛的应用。

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On the other hand, the optimization of DMF method was done by improving tray configuration and decreasing the times of butadiene phase changes.

DMF法流程优化的原则是改进塔板结构，减少丁二烯的相变次数。

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Then, it puts forward a conflict pre-checking and conflict processing approach. This approach aims at finding and solving conflict during the early design phase and decreasing resource waste.

同时，所提出的冲突预检查及冲突处理的方法可以在设计的早期阶段发现和解决冲突，以避免不必要的资源浪费。

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