80/20 Rule? How It Works For Programmers

“The Pareto principle (also known as the 80/20 rule, the law of the vital few, or the principle of factor sparsity) states that, for many events, roughly 80% of the effects come from 20% of the causes.” — Wikipedia

80% means the majority, while 20% is the minority.

The approach is applicable but not universal.

1. When Starting a Project