Lots of applications with less visa officers... Everything happens in stages.
1) App is received and checked for completeness.
2) If all is well they send they provide an AOR and application goes for further processing.
3) They check the paperwork you have provided to see if you are eligible. If you are they progress.
4) They do an RCMP name check on you. IF something is returned they ask you for an RCMP PCC.
5) A security check is also done by CSIS.
6) If everything comes back well then they request medicals.
7) If medicals are good then they usually issue PPR.
Everything is done in stages. They open the file and then it is left idle while things happen and they work on other peoples files. Sadly due to volume, it takes a long time for everything to happen!