8020sääntö

8020sääntö, also known as the Pareto principle or the law of the vital few, is an observation that roughly 80% of effects come from 20% of causes. This principle was first articulated by Italian economist Vilfredo Pareto in 1906, who observed that approximately 80% of the land in Italy was owned by 20% of the population.

The 8020sääntö is not a strict mathematical law but rather a common rule of thumb that applies to a wide range of phenomena. It suggests that a disproportionate amount of results often stems from a relatively small number of inputs or efforts. For example, in business, 80% of a company's sales might come from 20% of its customers, or 80% of customer complaints might be related to 20% of the products. In personal productivity, 80% of one's achievements might come from 20% of their tasks.

Understanding the 8020sääntö can be beneficial for prioritizing efforts and resources. By identifying the critical 20% of causes that yield 80% of the results, individuals and organizations can focus their attention on the most impactful activities. This can lead to increased efficiency and effectiveness by minimizing time and energy spent on less productive areas. While the exact percentages of 80 and 20 may vary in different situations, the underlying concept of unequal distribution of inputs and outputs remains a prevalent observation across many domains.