My T-shirt agile estimating cards have been very popular, but the price can quickly add up if ordering ten or more packs. So, I’ve created a pdf document of my T-shirt cards which allows you to build them yourself (with access to a printer and a pair of scissors). The document is arranged for US Letter but it still prints out perfectly fine on A4 … I know this, because that’s exactly what I do.
I’ve written a short introduction explaining the origins of Estimating Poker, how to use the cards, and some common variations that teams will often adopt. Here’s an excerpt of the introduction.
“Estimating poker is a technique often used by Agile and Scrum teams to estimate work. Estimating poker formalises the process of collaborative estimating which teams will tend to (or should) do regularly.
Estimating poker is a variant of Wide Band Delphi, an estimating approach described by Barry Boehm in his book ‘Software engineering economics” (1981). The Delphi technique originated from the Rand group during the 1950’s. The Delphi method states “Have a group of subject matter experts independently estimate a given problem. Bring the experts together to discuss their results, and differences. Have them go away and then independently re-estimate the problem. Repeat this process until agreement is reached or you are satisfied with the result”
In Scrum, this simple approach is applied on a wide band scale. The modern roots for planning poker come from James Grenning’s description of it in his paper, “Planning Poker or How to avoid analysis paralysis while release planning.”
But wait! There’s more!
T-shirts are pretty boring … won’t it be more fun to have a beer sizes, martian weapons sizes, or zombie weapons sizes? As they say in Texas … “Hell, Yeah!” You can see a sample of these in the images below. I’ve wrapped up all these variations (T-Shirts sizes, Beer sizes, Zombie weapon sizes and Martian weapon sizes) into a single zip file which can be downloaded below.