I can’t recall when I first came upon the Pareto Principle. I think it might have been when I was studying for my Six Sigma Green Belt. But I’m unsure. I know I was operating as a QA Director at the time, because most of my example uses for it surrounded testing and defects. Nonetheless, it’s probably been over 15 years.
That being said, I don’t think I hear people “considering” Pareto enough in their day-to-day activity, so I thought I’d bring it up and remind everyone of the Pareto Principle or 80:20 Rule and it’s implications for software engineering in general and agile teams in particular.