Requirements Modelling Technique Kegiatan terbaru situs unk1546

Requirements Modelling
Technique
Uung Ungkawa
Maret 2011

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Identify HW system/interface
Identify Data
Identify Controls
Identify Terminators
Draw DCD (Data context Diagram)

Draw CCD (Control Context Diagram)
Decompose DCD into DFDs (Data Flow Diagram)
Assign data to each DFD (Process)
Assign controls to each CFD (control flow diagram)

Steps
• Identify HW system/interface

Steps
• Identify Data
– Shaft rotation
– Fuel quantity
– Displays
– Throttle position

Steps
• Identify Control
– Braking status
– Top gear status
– Engine running status

– Driver commands

Steps
• Identify Terminators
– Driver
– Throttle Mechanism
– Brake
– Engine
– Transmission
– Drive shaft

Steps
• Draw DCD

Steps
• Draw CCD

Steps
• Decompose CCD into DFDs
– There are 4 Process Bubbles: Measure Miles, Measure

Motion, Control Throttle, Monitor Status.

Steps
• Assign Data to each DFD

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