人对复杂问题理解能力是有限的，在软件系统的开发过程中，如何将复杂问题简单化是我们必须面对和解决的问题。在软件开发实践中系统分析技术所处的地位十分重要，文章探讨了如何正确的进行系统分析的方法，论述了UML的相关概念、特点、表示方法，及UML建模的重要性。%Human has limited ability to understand complicated problems ,therefore ,to simplify the problems is important during software development .System analysis technology is very important in software development .The paper discuss the right method of system analysis and the concept ,feature , method and UML structure's importance .
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