Re-Estimating, Velocity, and Completion Inaccuracies

I found the following paragraph from Mike Cohn’s “Agile Estimating and Planning”, a bit contradictory.

“You should re-estimate only when your opinion of the relative size of one or more stories has changed. Do not re-estimate solely because progress is not coming as rapidly as you’d expected. Let velocity, the great equalizer, take care of most estimation inaccuracies.”

I think Cohn actually meant to say that velocity would take care of our completion inaccuracies (progress not coming as rapidly as we’d expected), not necessarily of – as stated – our size estimation inaccuracies (our opinion of the relative size). To address the latter, as Cohn says, we might need to re-estimate.

Review: Taekwondo Spirit and Practice: Beyond Self-defense

Taekwondo Spirit and Practice: Beyond Self-defense
Taekwondo Spirit and Practice: Beyond Self-defense by Richard Chun

My rating: 2 of 5 stars

This book would have benefited of better editing and review. For example, the meanings of the words “Tae” and “Kwon” are all wrong. The “Note to Readers” on the Preface (page viii) says “Tae” meaning fist, “Kwon” meaning foot. This righted up on page 5. Also, this book is full of typos. :/ e.g., captions on some photos in page 70.



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