I’ve found the answer I was looking for. Your raw score bucket is driven by your raw score. Domestic fleets a raw score of 0-80 is bucket 1, 81-129 is bucket 2, 130-163 is bucket 3 and 163+ is bucket 4. So, assuming everyone with 1 day of availability is under a raw score of 80, everyone is in bucket 1 and then it goes inverse seniority order.