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DEVRY CIS 321 Week 5 Milsestone 4 Part 2 .pdf

Original filename: DEVRY CIS 321 Week 5 Milsestone 4 Part 2.pdf
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DEVRY CIS 321 Week 5 Milsestone 4 Part 2

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Level 0 Data flow Diagram

After completing this milestone, you should be able to:

Create a Level 0 (System) Data Flow Diagram

Create a Child Data Flow Diagram

Before starting this milestone, the following topics should be covered:
• Process Modeling - Chapter 9

As a systems analyst or knowledgeable end-user, you must learn how to draw data
flow diagrams to model business process requirements. The preliminary
investigation and problem analysis phases of the methodology have been completed
and you understand the current system’s strengths, weaknesses, limitations,
problems, opportunities, and constraints. You have already built the Context models
(Milestone 3) to document business requirements for the new system. You now need
to build the Level 0 (System) DFD and corresponding process models.


Develop Level 0 DFD. Make assumptions where necessary.


Draw one Child Diagram using the Level 0 diagram.

Continue decomposition of one process up to primitive processes (Level 2,
Level 3, etc.)

Deliverable format and software to be used are according to your instructor’s
specifications. Deliverables should be neatly packaged in a binder, separated with a
tab divider labeled “Milestone 5-Part II”.
• Context Data Flow Diagram Narrative – Exhibit 5.1
Level 0 Data flow Diagram

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