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

Vilfredo Pareto option D is the correct choice

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.

Option D is the correct answer based on research of rich families of medieval Europe.

My opinion is that the right answer is:

D. Pareto

The Pareto chart provides a graphic depiction of the Pareto principle, a theory maintaining that 80% of the output in a given situation or system is produced by 20% of the input. 

n 1906, Italian economist Vilfredo Pareto created a mathematical formula to describe the unequal distribution of wealth in his country, observing that twenty percent of the people owned eighty percent of the wealth. In the late 1940s, Dr. Joseph M. Juran inaccurately attributed the 80/20 Rule to Pareto, calling it Pareto's Principle. While it may be misnamed, Pareto's Principle or Pareto's Law as it is sometimes called, can be a very effective tool to help you manage effectively.

Pareto option D is the answer

thanks for invition ,,,,,,,,,, my choice is option D

the correct answer D : Pareto 

Option (D) Pareto principle. Thanks.

D. Pareto,

Thanks..............................

Pareto concept is the right answer