In assortment analysis, the Pareto Principle means a relatively small group of items usually generates a large share of category sales. This is why efficient assortment work cannot treat every SKU as equally important. The CPCM course describes efficient assortment as the analytical process behind product assortment and a foundation for category management planning. CMKG also criticizes basic item-rank reports when they are used mechanically, which confirms that item sales rank matters but must be interpreted with shopper, strategy, and category structure.
Option B captures the principle correctly: most sales tend to come from a small percentage of best-selling items. Option A reverses the logic because niche items usually do not create the majority of sales. Option C is wrong because item contribution is not equal. Option D is wrong because the 80/20 rule is widely used in sales, assortment, productivity, and category analysis.
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