In PERT/CPM, a merge event represents the _____ of two or more activities.

Correct answer: completion

In a PERT/CPM network, an event is a milestone. A merge event is reached when two or more predecessor activities come into the same node. Therefore, it marks the completion of those activities before the next activity can begin.

• Completion: matches the definition of a merge event.

• Beginning/splitting: describe a burst event, where one node leads to multiple successor activities.

• Joining: describes the visual convergence, but the event itself represents completion.

Final answer: completion.