0。(2)流程层次图 a process hierarchy diagram or functional decomposition diagram) provides a graphical view of the functions of a system and helps you decompose them into a tree of sub processes. 流程层次图(或功能分解图)提供了系统功能的图形视图, 并帮助分解成一个子流程树。 第16页（2）流程层次图 • A process hi h erarc y diagram (or f ti l unctional d iti ecomposition diagram) provides a graphical view of the functions of a system and h l e ps you decompose them i t n o a tree of sub‐ processes. • 流程层次图(或功能分解图) 提供了系统功能的图形视图， 并帮助分解成一个子流程树。 第 16 页