I will share what the actual pve elements look like soon. Ill include here what I sent to lurvi when he asked me about how encounters would be tracked.

As for pve the approach im going with is phases

So for instance in brc the first phase is initiated when any damage is dealt or taken from any of the starting mobs and the phase ends upon the first boss taking or receiving damage. Then the second phase starts whenever the boss takes damage, and the phase ends upon the boss dying.

The overall time for the encounter is those phases completion times added up.

The time between phases is not included.

So if the raid takes a moment after killing a boss and pulling the first add after the boss, that time wont hurt the overall run time.