In this article:
- Scrum of scrums
- the bare bones of my approach: Putting the XP in Scrum by Roy Osherove
- explore: the MVPs, the prototypes, the architectural spikes, etc
- expand: when people within the organization “yell at you”, the feature gains visibility, etc
- extract: A/B tests, cost optimization, etc; this is where TDD pays out
These “games” were mentioned by Kent Beck in https://www.youtube.com/watch?v=fH4gqsIYzyE, in which it's about the evolution of a feature/epic/initiative/project within an organization. These stages are usually S-shaped, explore is flat, expand is the growth part and “extract” is when you try to gain new knowledge.
The proper explanation about this S-shape model is explained by Kent Beck in https://www.youtube.com/watch?v=FlJN6_4yI2A