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6-7 6-8 6-9 Process Data flow Data store External entity 6-10 Context diagram Level 0 diagram Level 1 diagram Level 2 diagram 6-11 6-12
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For each DFD: Check each process for: A unique name: action verb phrase; number; description At least one input data flow At least one output data flow Output data flow names usually different than input data flow names Between 3 and 7 processes per DFD 6-31 6-32 6-33 6-34 6-35 6-36 PowerPoint Presentation for Dennis, W ixom, & Roth Systems A nalysis and Design, 3rd Edition
6-37 6-38 6-39 6-40 Copyright 2006 John Wiley & Sons, Inc. All rights reserved. 6-41 PowerPoint Presentation for Dennis, Wixom, & Roth Systems Analysis and Design, 3rd Edition