Whats the pareto principle of mechanical engineering?

The Pareto principle is an important method manufacturers use to determine which problems that need to be solved will bring the best return on investment.  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.

Iwould sure like to answer your question but i honestly just don’t know

2. they have negligible mass.