Create a Context-Level DFD to Visualize Project Scope

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DESCRIPTION (lecture 6)

Jump-Starting Context Diagrams, Data Flow Diagrams, Workflows, and Process Models by Visualizing Material and Data Movement within an Organization

Converting a Rigorous Physical Process Model (RPPM) to a Context-Level Data Flow Diagram (DFD) is a simple but critical step in the early project discussion. An RPPM is a great first-cut diagram that focuses on organizational units and the exchange of material or data. Looking inside an organizational unit to see how they do what they do requires a more detailed perspective. The Context-Level Data Flow Diagram is a phenomenal picture of the scope of a project and sets the stage for drilling down individual processes to get the right requirements for your project.

Lecture 6 answers questions like:
1. What is the difference between a Rigorous Physical Process Model and a Context-Level DFD?
2. How can I convert the RPPM to a legitimate DFD?
3. Why is this conversion necessary?


This KK is part of an eCourse (VIEW FULL COURSE DESCRIPTION AND OUTLINE at In this course you will learn the answers to these questions:
• What is a Data Flow Diagram (DFD) and what does it do for you?
• What is the difference between a Rigorous Physical Process Model and a Context-Level DFD?
• What symbols can you use on each type of diagram?
• What is the business value of exploding or levelling a DFD?
• What is a simple approach for drilling down into a process?
• How can you show the internal processes and flows that produce the results?
• What does balancing a Data Flow Diagram mean and what is the business value?
• What is the most efficient approach to balancing a DFD?
• What business value do detailed process specifications offer?
• How can you express detailed specifications for processes and data?
• What is “metadata” and why do you need it?
• What does a fully balanced DFD look like?
• What value does a DFD fragment provide?

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