Goldilocks is an interesting technique and basically doing the opposite of estimating: You shape the work into the desired sizes.
- Vote each item into one of three piles: “Too Big”, “Just Right”, and “Too Small”.
- Split any “Too Big” items into “Just Right”-sized ones.
- Group any “Too Small” items together into “Just Right”.
The Goldilocks Principle applied to sorting stories reminds of potato grading machines that sort potatoes into different sizes.
Enjoy the flow.
Source: InfoQ » Q&A on Kanban in Action.