Abc classification, also known as Pareto analysis or barreto analysis, Plato analysis, primary and secondary factor analysis, ABC analysis, classified management, material key management, ABC management, ABC management, Barrett analysis, which is the so-called "80 to 20" rule. EMBA, MBA and other mainstream business education have introduced the enlightenment of ABC classification to enterprise management and its influence on managers' organizational decision-making.

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ABC analysis can also be applied to marketing management. For example, when analyzing and managing the customers of a product, an enterprise can divide users into Class A users, Class B users and Class C users according to the purchase quantity. Because the number of Class A users is small, but the purchase volume accounts for 80% of the company's product sales, enterprises generally set up special files for Class A users, assign special sales personnel to be responsible for the sales business of Class A users, provide sales discounts, send people to visit users regularly, and adopt direct sales channels, while for Class C users with large quantity but small purchase volume and scattered distribution, indirect sales channels using middlemen can be adopted.

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