添加功能
添加功能： 1. 选中产品或工序； 2.单击右键； 3.调出命令环； 这三步贯穿整个结构树上的分析过程。调出命令环后，选择添加功能或特性即可。
功能的分析建议从产品开始，逐级往下分析，一直到要素层。
添加特性
- 选中产品、工序、要素或功能
- 单击右键
- 调出命令环
- 添加特性
- 双击弹窗右边“技术要求”或“特性分类”，补充更多信息
建立功能网
功能/特性分析完成后，打开关系树页面，选中”聚焦层级“的功能特性后，再点选”上、下级对应的功能特性。聚焦层级的内容前后有”o“图标，空心/实心代表关联状态。
查看功能网
功能网建好后，在分析树页面，任意选择功能特性内容，右键调出命令环，查看功能网
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