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 								- 首先是基本的相互作用关系 (fundamental interaction), 它与 示意图中连接各组件的那些线条相对应。例如， 一张纸从纸张托盘移动到打印装置中，因为 这种基本的相互作用关系是系统运行的基础，所以，在最早设计示意图时就应该计划好，并 要很好地加以理解。其次是附属的相互作用关系 (incidental interaction), 它是功能单元特定的 实体设置或组件之间具体的几何排列造成的。例如，纸张托盘中的传动器所引起的震动会干  扰打印墨盒在X 轴的精确定位。  It is most likely that a different person or group will  be assigned to design each chunk  ¡ Because the chunks interact with one another in  both planned and unintended ways, these  different groups will have to coordinate their  activities and exchange information  ¡ To manage this coordination process better, the  team should identify the known interactions  between chunks during the system-level design  phase There are two categories of interaction  l Fundamental  ¡ Those which correspond to the lines on the  schematic that connect the chunks to one  another  ¡ These are the fundamental interactions of  the systems operation l Incidental ¡ Those that arise because of  l the particular physical implementation of  functional elements, or  l because of the geometric arrangement of  the chunks ¡ An incidental interaction graph is used to  document this type of interaction, see next  slide
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 				- ## Topic 12 / 13: Detail Design and Prototypes
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 			- DONE Week4
 	- LATER 概率论 (隔了一个周末)
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