８０／ ２０／２０则指出：在因和果、投入和产出。努力和收获之间，本来就存在着不平衡的关系。典型的情况是：８０％的收获来自２０％的努力；８０％的销售额来自２０％的顾客 客；８０％的利润来自２０％的顾客。８０／２０不是精确的关系，而是方便的比喻、典型的模式。把８０／ ２０法则运用到市场营销中，我们可以找到非常可贵的营销策略．成为营销实践家的”灵丹妙药”。 80/20/20 states that: In consequence, inputs and outputs. There has always been an imbalance between effort and gain. The typical situation is: 80% of the harvest from 20% of the effort; 80% of sales from 20% of customers; 80% of the profits from 20% of customers. 80/20 is not a precise relationship, but a convenient metaphor, a typical pattern. Applying the 80/20 rule to marketing, we can find a very valuable marketing strategy. Become a marketing expert “magic bullet.”