确定界面之间拥有权并将相应要求从上到下予以分配 -图之连接 DFMEA-B Diagram DFMEA-B Diagram Design Internal Subsystems 定义内部子系统 Define External Subsystem 定义外部子系统 Outside Subsystems Interactions 外部子系统互连 Inside Subsystems Interactions 内部子系统互连 Establish the B –diagram 建立边界图 The internal subsystems are mainly generated from internal block diagram. In addition, it contains other subsystems, like PCB, mechanical part(s) etc.. 内部子系统由内部系统框图转化,另包含其他组件,如PCB,机构件等 Subsystem A MCU Subsystem B UHF Matching Network Interface Subsystem C LF Resonance Interface Subsystem D Battery Subsystem E Button Control Interface Subsystem F LED Indicator Interface Subsystem G Crystal Unit Interface Subsystem H PCB Subsystem I Mechanical Parts Subsystem K Intermediate Key Ring Whetron Transmitter DFMEA-B Diagram Design Internal Subsystems 定义内部子系统 Define External Subsystem 定义外部子系统 Outside Subsystems Interactions 外部子系统互连 Inside Subsystems Interactions 内部子系统互连 Establish the B –diagram 建立边界图 Subsystem A MCU Subsystem B UHF Matching Network Interface Subsystem C LF Resonance Interface Subsystem D Battery Subsystem E Button Control Interface Subsystem F LED Indicator Interface Subsystem G Crystal Unit Interface Subsystem H PCB Subsystem I Mechanical Parts Subsystem K Intermediate Key Ring Supplier A ECU1 Subsystem L RF Receiver Interface Supplier B ECU2 Subsystem M LF Tx/Rx Interface Supplier C Key