| ENGAGE QUALITY ASSURANCE | Quality Assurance is not an afterthought. | There is no testing team; testers are part of the team. You also need automated check-in testing for Scrum to work well; otherwise you end up with production rework and waste. |
| GROUP VALIDATION | Reviews and validation are good not only for the sake of the code, but for information exchange as well. | It is the team that is committed in Scrum — it isn’t just QA who signs off on it. |
Other patterns at http://www.scrumorgpatterns.com-a.googlepages.com/scrumpatternssummary