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Should we stop using story points and velocity?

Should we stop using story points and velocity?. Prasanna Vaste Agile India 2014. 資工碩一 陳懿婷 102522113. Outline. Introduction : Why Estimate? Motivation Methodology Advantage Conclusion. Introduction: Story point and velocity. Story point: What: 分析完成一個 story 所需花費的 effort 。

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Should we stop using story points and velocity?

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  1. Should we stop using story points and velocity? PrasannaVaste Agile India2014 資工碩一 陳懿婷 102522113

  2. Outline • Introduction:Why Estimate? • Motivation • Methodology • Advantage • Conclusion

  3. Introduction:Story point and velocity • Story point: • What:分析完成一個story所需花費的effort。 • When:在estimate session中評估。 • How:常見的Planning Poker。 • Velocity:每個sprint結束後，團隊真正完成的story point數量。

  4. Introduction:Why Estimate? 1.Track velocity 2.Decide scope for the Iteration —Story point & velocity 3.Help Prioritize stories 4.Help Release planning

  5. Motivation • Estimation takes lot of time and effort. • PM tend to relate these estimates to number of days it will take to complete the story. • In some teams estimate is equal to deadline. 以上情況導致-In lack of confidence on development team when stories take more time to complete. So…They use of simple Metric for Project Process Measurement -Use Story Count

  6. Methodology常見的Scrum作法 New Project Product Backlog 約需要10個Spring來完成 Story point=200 30 10 假設1 sprint完成20 point 20 Velocity=每個sprint過後完成的story point數量為多少

  7. Methodology作者的作法 New Project Story Count 要花多少個Sprint來完成MVP scope Number of stories on backlog sprint1 (1 week ) 計算 Number of story completed in a sprint Velocity 完成的Story Count數量

  8. 兩者差異 • Story切割的方式-Story Point vs Same size • Project Progress Measurement- Story Point vsStory Count • Velocity定義方式-Story Point vs Story Count

  9. AdvantageHow Story count helped • Product owner and Team were happy with this change as: • Less Math, more effective planning • Better way to track change in scope • More focus on completing stories which give higher business value instead of quick gain in story points.

  10. 作者建議 • You can evolve your estimation process from “Story Points(Ideal Days)→Relative sizing→Counting cards→Cycle time”

  11. Conclusion • Stop wasting time trying to estimate a nerver ending Backlog. • There’s no evidence that that will help you predict the future any better than just counting the number of stories “Done”!

  12. 備註:Product Backlog

  13. 備註:MVP(minimum viable product) • 用最快最簡單的方式建立一個可用的產品的原型，來表達產品的效果，進而補充細節。

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