“Unless you’ve been living under a rock, the chances are good you’ve heard of the 80/20 principle, also known as Pareto’s Law or the Pareto Principle.
To state it simply, it means that ~80% (a solid majority) of outputs (peas, revenue, widgets, etc.) comes from ~20% (a clear minority) of inputs.
80% of your peas will come from 20% of the plants. 80% of your revenue will come from 20% of your clients. 80% of your employee output will come from 20% of your employees.”