Not yet reached
none
Enrolled, but no email has gone out to them yet. Nothing here is a follow-up decision; it is a queue waiting on its send window.
Everyone enrolled has been emailed at least once.
Mid-sequence, awaiting reply
none
Emailed, no answer yet, and the sequence still has touches queued for them. Nothing here needs a decision: the campaign is still doing the asking. Longest since the last touch first.
Nobody is mid-sequence right now.
Gone quiet
none
Their sequence finished and they never answered. This is where silence is the final word, so these are the ones worth a call or a different angle. Longest silence first.
No sequence has run out without an answer.