Data and Process Modeling
With requirements defined, a system analyst focuses on how system data is transformed into useful information. The deliverable of data and process modeling is a logical model. A logical model shows what the system must do, regardless of how it will be implemented physically. Later, in the systems design phase, a physical model is built that describes how the system will be constructed. Data and process modeling involves three main tools:
- data flow diagrams
- a data dictionary
- process descriptions
At the end of this week, you will be able to:
- Describe data and process modeling concepts and tools, including data flow diagrams, a data dictionary, and process descriptions
- Describe the symbols used in data flow diagrams and explain the rules for their use
- Draw data flow diagrams in a sequence, from general to specific
- Explain how to level and balance a set of data flow diagrams
- Describe how a data dictionary is used and what it contains
- Use process description tools, including structured English, decision tables, and decision trees
- Describe the relationship between logical and physical models
- Read Module 5: Data and Process Modeling.
- Participate in Module 5 SCR Case Simulation: Data and Process Modeling.
- Take the Unit 5 Test.