It was discovered by the Italian economist Pareto at the end of 19 and the beginning of the 20th century. He believes that in any group of things, the most important thing only accounts for a small part, about 20%, and the remaining 80% is secondary, although it is the majority, so it is also called the 28 th Law.
The 80/20 analysis method examines the relationship between two groups of similar data to change the relationship they describe. One of the main purposes is to find out the key reason of this relationship-20% input will produce 80% output, and reduce resource consumption while achieving the best performance.
Extended data
1897, the Italian economist Valledo accidentally noticed the wealth and income pattern of the British in the19th century. In the survey and sampling, it was found that most of the wealth flowed to a few people. At the same time, he also found from the early data that in other countries, this subtle relationship appeared again and again, and it showed a stable relationship in mathematics.
Therefore, Pareto found from a large number of specific facts that 20% of the people in society occupy 80% of the social wealth, that is, the distribution of wealth in the population is unbalanced.
At the same time, people also find that there are many unbalanced phenomena in life. Therefore, the "28 Law" has become the abbreviation of this unequal relationship, regardless of whether the results are exactly 80% and 20% (statistically speaking, the probability of accurate 80% and 20% is very small).
Baidu Encyclopedia -28 Method