Discusses how to apply grey systems to quality estimation. Puts forward methods and procedures of synthetic evaluation of grey systems. Presents two examples to support the theory.

将灰色系统应用于教学质量评估，提出了教学质量以及学校教学管理评估体系的灰色系统综合评判的步骤和方法，并进行了实践。

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So the it is very difficulty to guarantee the efficiency and quality of the software with traditionary methods of systems analysis and design .

传统的系统分析设计的方法难以保证开发的效率和质量。

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This paper analyses the common quality faults in fire water supply systems and provides relevant disposal methods.

对消防给水系统中易出现的质量问题进行了分析，并提出了相应的防治措施。

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