When is a call considered 'Unanswered' in a queue?

[WRP]

If no agents are in the queue and the caller is eventually forwarded to a different destination automatically (such as voicemail or an external number), is the 'unanswered calls' counter incremented?

[QueueMetrics]

Yes - all calls that aftyer hittinga queue are not answered by a human but terminated for any other reason are "unanswered". Then in the unanswerd page you can see why each of them was not answered.