As far as I know, IRCC will conduct following review on applicants:
https://www.canadavisa.com/canada-i.../threads/september-2020-aor-join-here.700416/
Eligibility - CIC evaluation of your compliance with all requirements (pass or fail)
Medical - Applicants medical exam when requested by CIC
Criminality - PCC sent with application, including CIC independent checks and RCMP (when requested)
Security - Checks completed by CSIS
Normally, medical is the first stage and followed by criminality and eligibility. Security is the last stage. After all processes are passed, they will issue the Passport Request (RRP) which is the signal of issuing CoPR.