Why Agile Teams Should Estimate at Two Different Levels

It is very common for agile teams, especially Scrum teams, to estimate both their product backlog and sprint backlogs. In this article, Mike Cohn will address:

  • Why estimating both the product backlog and sprint backlog can be useful even though it seems redundant
  • Why teams should estimate the two backlogs in different units
  • When teams should estimate
  • Whether all teams should estimate

Although I think you should not try to use hours for estimation, I agree using different valuations for an estimation is best. I find using T-shirt sizes for PBIs and Story Points for SBIs work well.

Read the complete article here, and also take note of some excellent comments at the bottom: https://www.mountaingoatsoftware.com/blog/why-agile-teams-should-estimate-at-two-different-levels

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