The beginning and end points, known as nodes, in a series of sub-activities on a CPM/PERT often have arrows between them to indicate what order tasks must be completed.

Name: The beginning and end points, known as nodes, in a series of sub-activities on a CPM/PERT often have arrows between them to indicate what order tasks must be completed.
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This statement is true. The arrows between nodes on a CPM/PERT chart signify the order in which tasks must be completed.

The Beginning and End Points, Known as Nodes, in a Series