That seems reasonable, but I would say you don't have to resort to such crudeness. In my experience I know the difference between a task that will definitely take weeks and a task that might take a day or might take weeks. Just let me write that down!
Even if you don't have any idea about the uncertainty we already have a crude way of measuring it - planning poker! Just record everyone's guesses instead of throwing away the uncertainty information. There's a huge difference between everyone guessing 5, and some people guessing 1 and others guessing 20.
I agree about points being stupid though - there's simply no way to avoid it being converted to/from time, because that's the actual unit of work.
Sorry, reading back I definitely come across as disagreeing - I would kill someone for task tracking software which supports giving the degree of uncertainty on an estimate.
Even if you don't have any idea about the uncertainty we already have a crude way of measuring it - planning poker! Just record everyone's guesses instead of throwing away the uncertainty information. There's a huge difference between everyone guessing 5, and some people guessing 1 and others guessing 20.
I agree about points being stupid though - there's simply no way to avoid it being converted to/from time, because that's the actual unit of work.