Data Flow Diagram DF Terminator Process Store Terminator

Data Flow Diagram DF Terminator Process Store Terminator Jiraphan Computer Education, KMITNB

Key Terms n Data Flow, Data Flow Diagram n Terminator, Sink, Source n Process n Data Packet n Context Diagram

Components of a DFD w สวนประกอบของ DFD มอย 4: l - Process l - Data Flow l - Data Store l - Data Source / Data Sink (Terminators) w คำอธบายรายละเอยดของ Data Flow และ Data Store จะอยในสวนของ Data Dictionary w รายละเอยดของ Process จะเขยนอธบายใน process

Levels Required w Small systems: systems 2 – 3 levels w Medium systems: systems 3 – 4 levels l - Maximum 74 = 2, 401 processes and stores w Large systems: systems 5 – 8 levels l - Maximum 78 = 5, 764, 801 processes and stores

��. Video Purchase System Management Reports Video Information Management New Customer Information Video Rental Item Customer ID Payment Returned Video Information 0 Video Rental System Rental Receipt Video Rental Card Customer Monthly Bonus Card Yearly Bonus Card Total Cash Received Accounting

Use Case Diagram w �� Diagram ���������� n Use Case n Actor n Use case Relation n System

Use Case Diagram Simple. Watch Actor Read. Time Watch. User Use case Set. Time Change. Battery Watch. Repair. Person