Model: 3x for estimates

"No estimates" idea is great or bad depending on which phase you're in

explore: estimates are waste

-> great idea in exploration, because you've never done it before

-> estimate is just a guess, no value, wasted effor

expand: (not mentioned in talk)

extraction:

-> estimates are important data for making decisions

-> do I do project A or project B

-> estimates are useful input for ROI

(src: Video: 3x Explore, Expand, Extract - Kent Beck)