业务分析员会创建一系列的文件及其他的工件，以表达当前的系统以及预期的方案。
The business analyst creates a series of documents and other artifacts to express the current system and the proposed solution.
图2：在需求开发过程中由系统分析师产生的工件和活动。
Figure 2: Activities and artifacts produced by System Analysts during requirements development.
本文用有限元方法对曲轴工件系统进行了模态分析，求出了前六阶模态参数。
A modal analysis using the finite element method is carried out for a crankshaft workpiece system. Six lowest order modal 'parameters have been obtained.
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