My observation (which may be wrong) is that the first process is R10 that is a Completeness Test after which applicants receive confirmation email that there file is being reviewed now.
After R10 there are three tests that runs simultaneously (Only my guess)
A11 That review that applicant has met Minimum Eligibility Requirment (R75 MER)
A40 That review Fraud and Misrepresentation R75 MER
In order to perform A11 and A40 on R75 the following Documents (Scanned Copies submitted) are reviewed
1) R78 Education
2) R79 Language
3) R80 Work Experience
4) R81 Age
5) R82 Arranged Employment (if any)
6) R83 Adaptability (All components Applicable)
In addition to these R76 Settlement Funds is also verified.
After that A11 and A40 is passed only Admissibility Test remains (That I guess is started along with A11 and A40)
Admissibility Test (A16)
In this Test first thing they check is R29 Medicals and then move into Security Checks. This includes verification of Police Certificate, Criminal checks with International Agencies, and running Test in Canada's own system.
Medical is usually completed in 1 month but many people believe Security Checks can take upto 6 months or more to complete.
However, I think process may be different for each class and program.