System Analysis and Design
An open rectangle

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

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System Analysis and Design
A menu-driven system

can be used only by computer professionals
None of these
increases the operator's work
presents options and allows the user to make selections
is required only for on-line systems

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System Analysis and Design
In a Decision tree

the root is drawn on the left and is the starting point on the decision sequence
the branch, to be followed, depends on the conditions and decisions, to be made
all of the listed here
the nodes represent the conditions, with the right wise of tree listing the actions to be taken

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