I applied (mid) last year as a NTR Boeing experience FO (DAY 1)
2 weeks after day 1, assisted a QRA Roadshow,
3 weeks since day 1 , status "Shortlisted"
1 1/2 months since day 1, got invited to do the PSA, 2 days after got the positive results
2 months after day 1, invited for interview (about 35 days of heads up) (plenty of time to study)
Cancelled my interview invitations for 2 months in a row (no space on my monthly schedule), got email from HR asking for date of vacations so they could invited me without having a flight schedule problem (told them to wait 3 more months, no problem for them)
Assisted interview, found it to be very easy (if well prepared), my humble opinion; easy breezy (they are not there to Fail you or to push you to do so, if you fail please go back to flight school)
4 days after interview got the good news and application status Preparing written offer
10 days after interview got an email from HireRight
The most challenging part of the screening process is HireRight,
they will push you to the limit
5 weeks after interview Job offer 787 DOJ January '16
Good luck
Flt time at day 1 2,900hrs total
Flt time today 3,800ttl