T-shirt estimation

Don’t estimate unless you do it on a high level.

Use it for a roadmap. Use it as for relative size, not as time.

I don’t use the Fibonacci sequence anymore (1, 2, 3, 5, 8, 13, 20). It has too many values to choose from. Subconscious I still connect it with time, how hard I tried not to. It is also difficult to grasp for new people to a team. They are often confused how to score work using this.

My preferred way now is to use T-shirt sizes. People just ‘get’ this, they have experience using this measurement within their daily life. And for me, it doesn’t have any connection with time: it is just size. Relative size.

I try to only use S, M and L. So very high level and rough estimates. Occasionally a XS or XL slips in but try to stay away from it.