I'm glad @fulhack wrote this clear analysis about estimating software projects. It maybe needs another explanation about why the mean and median completion time for software development tasks are so different, so here's my take. (1/4)https://twitter.com/fulhack/status/1117968632536010754 …
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All the tasks which can be completed using known solutions, no matter how large they seem, will be competed quickly. So what's left after that? It might be a small part of the total, but it will need new solutions, working things out for the first time; all the unknowns. (3/4)
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So that's where almost all the time is spent: tasks that you've never solved before. And how do you estimate them, when you have no data? It's at best a guess. (4/4)
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