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Retail category management
Retail category management is the same discipline named from the retailer's side. The retailer runs it across every category in the store, and each supplier runs it for the one or two categories it competes in. The retailer holds breadth: every category, every outlet it operates, one dataset. The supplier holds depth: one category, and whatever evidence it brought about the shoppers who buy it elsewhere.
The gap is the outlets outside both files. Independent trade, informal outlets, and competing chains sit outside both.