Some of the more sophisticated systems apply the principles of engineering economy to include the time value of money in project decision making.

一些更为先进的系统则利用了工程经济原理，把项目决策中金钱的时间价值也包括了进去。

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To sum up, engineering economy system analysis and some design principles are employed in the analysis, evaluation and design of a specified project.

本文运用工业工程中工程经济和设施设计等方面的原理和方法，对一个具体的扩建工程项目进行了分析、研究和设计。

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