A common refrain is: faster, cheaper, quality: pick two. Kent Beck adds to this to include “more”, or an expansion in scope1. He anchors on quality being a constant so you get:
- Better/Sooner/Cheaper - Spiking to get better feedback (Exploring)
- Better/Sooner/More - Deliver features quickly without constraining cost (Expand)
- Better/Cheaper/More - economically deliver features for the long run (Extract)
1. Beck, K. Better/Sooner/Cheaper/More. (2022).