80% of the problems are found in 20% of the work is a concept of ___________.

A.
Edward Deming

B.
PhiliP Crosby

C.
Juran

D.
Pareto

Explanation:
D is the correct answer. Pareto law : A relatively small number of causes typically produce a majority of the problems and defects. This is called 80/20 principle , 80% of the problems due to 20% of the causes.