Over the last 6 posts, I have been looking at estimation. First, we looked at why we estimate, then we looked at some of the pitfalls in traditional estimation methods - the way we mistake accuracy for precision. Then we looked at some of the Agile estimation techniques - story points and T-Shirt sizes and the way they are designed to overcome the accuracy vs precision problem. We saw that while they generally do a good job, they also have some fairly serious pitfalls of their own. In the last two posts, we looked at taking T-Shirt sizing one step further and allowing only two sizes - small and extra-large (too big). By doing this we saw how the main pitfalls in the agile estimation techniques were overcome. We also looked at some of the main objections to story counting and my arguments on how these objections can be overcome.
I'm not the only person to come up with this technique. It's doing the rounds at the moment under the name "No Estimation Movement". Apparently I'm part of a movement. Cool.Read More