Are the assessment of the sponsor and the assessment of the sponsored carried out simultaneously or in sequence?
If done inland, it takes 11-12 months to assess the sponsor and 8 months to assess the sponsored.
If done outland, the processing time for the sponsor is 60some days and the processing time for the person being sponsored from the US is 11 months.
What exactly do you mean by "finished and landed"? What status would she have after the first stage (assessment of sponsor)? Would she have to leave Canada and then re-enter?
In an Inland application, some of the assessment takes place simultaneously, that is why stage 1 is 10-11 months long, followed by possibly another 9 months or more for stage 2. For an Outland application, they are done in sequence, hence the 60 or so days at CPC-Mississauga and then the 11 months (80% average time) for Buffalo. If you look around the forum, you will find that many Buffalo applicants are finalized in 4-8 months.
After Inland first stage, an applicant has what is called Approval in Principle. This means they have been found to suit the requirements of permanent residence, and provided that it was applied for at the same time as the original application, she can receive an open work permit and healthcare. That's 10-11 months, as stated previously (no variation to this timeline). Depending on where you live, it can take another 9 months for her to get a landing interview date and get her PR status.
The average Buffalo applicant (on this forum) becomes a PR in 4-8 months after Buffalo receives their application. This means they have PR status and are able to work, attend school, or whatever the plan is once Buffalo completes their paperwork.
If she remains in Canada for the entire time of the processing of an Outland application, she needs to either go to the nearest border point after receiving her Confirmation of Permanent Residence forms, or make an appointment at a local CIC office for a landing appointment. She won't actually leave Canada if she goes to a border point, it's called flagpoling, where the American authorities just turn you around since you don't actually want to enter the US, and Canadian border officers sign and complete the paperwork.