If there was a vote for the most popular word in a consultant’s vocabulary, the chances are that the word would be “MECE”.
Most people outside of the consulting world will not even be familiar with it and a lot of consultants that use it won’t even be sure that they’re pronouncing it correctly. But still, every problem you come across will raise the question “Is my approach MECE?”.
Ok, saying it would be THE most popular word among consultants might be a bit over the top, but that’s because the MECE principle is something that is considered the most basic knowledge in the consulting world.
Source: https://www.entrepreneurshipsecret.com/the-mece-principle/