It will take months

In a blog post entitled The Obamacare Rollout: The Administration Needs a Plan B––Now!, health policy expert Bob Laszewski reports:

It is now becoming clear that the Obama administration will not have Healthcare.gov fixed by December 1 so hundreds of thousands, or perhaps millions, of people will be able to smoothly enroll by January 1.
...
It's time for the Obama administration to get real. It takes months to properly test a complex data system like this. Two things are obvious:
1. When they launched on October 1, very little of the testing had been completed.
2. They are now in the midst of that many months long testing and fixing period. It is clear they don't have a few weeks of work left; they have months of work left.