In CPM network terminology, completion of an activity is generally represented as which network element?

Introduction / Context:
CPM and PERT networks use two fundamental constructs: activities (which consume time and resources) and events (which are milestones with zero duration). The question focuses on how the completion of an activity is denoted in the network diagram.

Given Data / Assumptions:

• Activity has a start and a finish.
• Events are zero-duration points marking start or finish.
• Nodes often depict events graphically.

Concept / Approach:
Completion (finish) of an activity is an event. In many notations, the event is drawn as a node, but the technical term for the milestone itself is event. A connector is a general term for links; it does not specifically denote completion.

Step-by-Step Solution:
Recall: event marks start or finish and has no duration.Map completion to the finish event of the activity.Select Event as the precise term.

Verification / Alternative check:
Standard definitions: events correspond to nodes in AOA; completion is the head event of the activity arrow.

Why Other Options Are Wrong:

• Node: Graphical representation of an event; less precise than naming the milestone as event.
• Connector: Not a standard term for completion.
• All the above.: Overbroad and imprecise.

Common Pitfalls:
Using node and event interchangeably; while related, the term event better describes the milestone conceptually.

Final Answer:
Event