Basic Use Case Model

 

 Block with Four Parts

 

 Block Hierarchy

 

 One Level Activity Hierarchy

 

 

 

 

 One Level Block Hierarchy

 

 One Level Requirement Hierarchy

 

标签：11,Case,Use,Level,Hierarchy,GA006,181,Block
来源： https://www.cnblogs.com/lzhzzh/p/14057768.html