My timeline:
PEI PNP paper based
2017.6.26 federal application received by CIC
2017.8.23 AOR
2018.3.5 additional document required email by CIC
2018.3.6 pre-arrival (IMM 5801)email received
2018. 3.8 additional documents submitted online
2018.3.26 Meical exam Request
2018.4.23 Medical exam done
Medical exam passed (not sure the date)
2018.10.10 PPR
2018. 10.11 DM