The flaw in the Fibonacci sequence - downloadable spreadsheet

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In May 2017, Keith Richards wrote an article about a fundamental flaw in the thinking behind using the Fibonacci sequence when estimating in an agille environment. Keith highlighted the fact that the error could be widely damaging because estimating how long product development or an agile project may take, is hard enough to start with, without making it harder.

This resource is a downloadable spreadhseet that works through the exact flaw. It is quite detailed and you will need to enjoy maths and excel to fully understand it!