Creating a sub-process
1. Insert one activity inside another.
2.
Select the activity. In Properties view, select the Activity Type.
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An Embedded sub-process shares the same data as the parent process.
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An Independent sub-process requires that you select a diagram reference and process
reference; the process is independent of the data for the current process
diagram.
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A Reference sub-process requires that you select another activity within the
current diagram as the reference point.