System Analysis and Design
Structured design methodology is an approach to design that adheres to rales based on principles such as

data flow analysis
bottom-up design
None of these
top-down refinement
All of these

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System Analysis and Design
An open rectangle

None of these
identifies data flow
is a data store-data at rest, or a temporary repository of data
defines a source or destination of system data
represents a process that transforms incoming data flow(s) into outgoing data flows

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