Day 4 – Process Modeling: Leveling DFDs. Today’s Tools Root Cause Analysis by Consultants More on DFDs Leveling DFDs Exercise 5 – in class Introduce TA’s. Root Cause Analysis for Consultants. Root-Cause Analysis for Consultants.
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This is a fundamental part of a consultant’s job and a key skill we look for in our candidates and employees
Use a standard methodology that provides a consistent approach to address a company’s issue
Background: Global multi-billion dollar manufacturing/ distribution company has implemented an Accounts Receivable system
This high level DFD shows the system and its environment.
Environmental elements in squares
One unnumbered process bubble (name of system)
Shipment Date Changes
Summary of Removals
Critical Levels Report
Of Free Beer
Beer Donation letters
Order Log Report
Inventory Log Report
Thank You Letters
Inventory Discrepancy Report
Arrows show data flow to and from the environmental elements.
In order to keep the diagram uncluttered, you can repeat external entities & data stores on a diagram
Standard rules apply however,
Remember: No more than seven (7) processes on one diagram
Drill down to show more detailed processes, data flows, and data stores.
Fig 0 Diagram
Fig 4 Diagram
Fig 4.5 Diagram
How many external elements interface with the Proposed Skill Set System?
How many data flows are going to and from the system?
Level 1 dfd
Reminder: This is a Level 1 DFD.
Note that process & data store numbers read left to right and top to bottom.
Notice that DFDs read from left to right, and top to bottom, like a written page.
This is a Level 2 DFD.
The Data Store #’s should match the higher level DFDs.
and then creating the lower level DFDs with the details
Unlike the Client Project, you read text to create your DFDs.
Instead of leaving the leveling process (the drill down process) wide open, the text was written with a sense of what the main processes are. The assignment is very specific.
You have a chance to explain, so if you feel this was the Best Group In The World, you can tell us.
Dept of State