Term
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Definition
| Focuses on the system’s processes and their inputs and outputs. |
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Term
Logical models ONLY show WHAT a system is or does.
Physical models show WHAT a system is or does AND HOW the system will be physically/technically implemented. |
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Definition
| What is the key difference between logical and physical models? |
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Term
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Definition
| A technique used to document a system’s processes. |
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Term
DATA FLOW DIAGRAM (AKA DFD)
Memory Tip:
D --> Depict
F --> Flow
D --> Data |
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Definition
| A process model used to depict the flow of data through a system and the work or processing performed by the system. |
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Term
| PROCESSES or work to be done. |
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Definition
| In DFD, what does a rounded rectangle represent? |
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Term
| EXTERNAL AGENTS -- the boundary of the system |
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Definition
In DFD, what do squares represent?
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Term
| DATA STORES -- AKA files/databases |
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Definition
| In DFD, what do open-ended boxes represent? |
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Term
| Data flows -- inputs/outputs |
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Definition
| In DFD, what do arrows represent? |
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Term
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Definition
| A person, organization unit, outside system or organization that lies outside of scope of project yet interacts with system is a(n) __________. |
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