As you insisted me to dig dipper into it, her's what I have found for you
Background & Security Checks
Note: Our Background Check comprises of 2 parts:
1. The Standard Documentation Checks,
2. The Security & Criminality Checks.
Standard Documentation Checks:
Our background check is done at the CHC stage. It commences the moment our file gets the 1st BFD by the VO. An indicator of which is the e-CAS that shows "In Progress". All docs been checked & our NOC being tallied against the MI, if the VO finds our case 'eligible' for Canadian PR, the file becomes 'Accepted'; and then it goes for standard background checks, viz. Exp, Quals, Adaptability, Qualitative Considerations etc.
The process involves many things. If our case file is well presented and the enclosures vouch the quality-quantity, adequate docs etc., there might not be a requirement of 'actually' calling the employers, references etc. The VOs have a way with that, they are experienced enough to ascertain the logical disposition of our case. But, if there are any concerns of his/her, s/he is likely to ask for additional docs, do further scrutiny vide any means [calling, visiting etc.] & might ask for an Interview.
-Culmination: When 'fully' satisfied, we get the 'Medical Request'.
-Timeframe: Can be anything around 6-8* months, for the 'fast track' system (Avg. 6-7 months).
-eCAS: Continues to Show 'In Process'.
Security & Criminality Checks:
A part of the b/ground checks is the 'Security Check'. It commences after our med results are submitted to the CHC. This is a major activity -mainly concerning our 'safe inclusion' into the Canadian Soil; vis-a-vis, Political, Socio-Econmical, Anti-Social disposition, perceived Threat to Canada's integrity etc. This gets us the SDEC, CDEC & SECCRIM.
This is a serious & time-consuming stage, involving many agencies, including CSIS, Interpol, NASC, Database Checking & touch-base with Local Police. Many things are considered here... the No. of countries visited, Applicant coming from 'certain' countries, ex-Servicemen [including Law Enforcement services], Prolonged stay in a country w/out sufficient docs to prove cause, frequent traveling to certain nations, your *Name (?), Inter-Religion/Nationality Marriages etc.
If everything is simple & straight, the file soon gets into the 'final review' stage. If there are any 'red flags', our case goes into a 'spin'. Then our file might go to the local Police/CID agencies; the outcome/timeframe of which is beyond the control of CIC. And thereby the timeframe can be anything [sometimes beyond 1yr]. But, usually this stage should be over by 5 months max. However, a point to be noted is that we can also be called for an Interview [at this stage], due to this reason.
-Culmination: Only upon security clearance we receive the PPR.
-Timeframe: Around 2 weeks - 3 months.
-eCAS: Still 'In Process', but 'Med Results Recd.' inside.
