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EnS0urce EnS0urce
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6 years ago
What assumption differentiates a physical from a logical DFD? What features may be present on a physical DFD that should never be present on a logical DFD?
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6 years ago
In general, features that are technology-specific may appear on a physical DFD but not a logical DFD. Also, processes, data flows, and data stores that would not be required if the system were implemented with perfect technology are never present on a logical DFD. Direct examples include processes that represent specific existing programs or persons (roles). Indirect examples include duplicate processes, data stores, and data flows and partitioning of processes or data flows that represents specific technology assumptions.
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