Discover and read the best of Twitter Threads about #estimation

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Why Story Points are Trash - a thread 🧵
1. Story Points are Subjective: Different people may have different interpretations of a particular story point value, leading to misaligned estimates and potential discrepancies in the overall estimation process. #estimation #noestimates
2. Story Points are Fragile: Changes in team composition invalidate relative estimation efforts. WIP impacts relative estimation efforts. Hidden dependencies impact story points.
3. Story Points are Hard to Define:
-Mike Cohn uses time: mountaingoatsoftware.com/blog/story-poi…
-Ron Jeffries uses days:
-Bloggers say capacity, effort, risk, time: peterkretzman.com/2018/10/24/quo…
WHICH IS IT!??!??!
Read 10 tweets
🔥 D'où vient le chiffre : "Plus d'1 milliard d'animaux morts en Australie" ? (thread)

🔸 Il s'agit d'une #estimation réalisée par le professeur en écologie Chris Dickman (Univ de Sydney), concernant les animaux "tués" par les incendies en Australie depuis septembre 2019. (1/.)
🔸 Celle-ci est basée sur un rapport du WWF de 2007 (il est co-auteur) sur les effets du défrichement des terres sur la faune en Nouvelle-Galles du Sud.
D'après ce rapport, 17,5 mammifères, 20,7 oiseaux et 129,5 reptiles vivent en moyenne sur 1ha. (2/.)
🔗 wwf.org.au/ArticleDocumen…
🔸 Cette estimation n'inclut donc QUE les mammifères, les oiseaux, et les reptiles. Les chauves-souris, les amphibiens, et les insectes (ou autres invertébrés) ne sont pas comptabilisés. (3/.)
🔗 Comment les chiffres ont été calculés : sydney.edu.au/news-opinion/n…
Read 7 tweets
THREAD. In honor of the #Apollo50th anniversary of the moon landing, here is a thread of #physics posts related to space travel. @nasa @esaoperations @ESA_History
1/ I will start with my #physics #estimation - what would be like to ride a bike to the moon? How long would it take? How many sandwiches would you need to eat? More homework included.

wired.com/story/how-long…
2/ Video analysis of the lunar lander launching off the surface of the moon.

wired.com/story/the-phys…
Read 23 tweets

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