Where does planogram collide?

The measured responsiveness of a product's unit sales to the amount of shelf room, or number of facings, it is given: adding space usually lifts sales, but by less and less, so the relationship is captured as an elasticity that says how much room each item earns. Curhan's 1972 study The Relationship between Shelf Space and Unit Sales in Supermarkets was among the first to measure this link across grocery categories, and Drèze, Hoch, and Purk's 1994 Shelf management and space elasticity turned it into a rule for allocating space to maximise category profit. Here the thing referred to is a statistical coefficient estimated from sales data, and it differs from the retailer and supplier practice of category management and from the drawn planogram, which are the same shelf problem approached as a strategy and as a diagram rather than as a measured number.[1][2]

Unit

One estimated elasticity linking a product's facings to its unit sales

Recovery means

Not applicable

Measured by

Estimated by regressing unit sales on shelf facings across stores, or from controlled changes in space

The practice of treating a whole product category, such as coffee or laundry care, as a single strategic business unit that a retailer and a lead supplier plan together, coordinating which items to stock, how to price them, and how much shelf room each receives. Basuroy, Mantrala, and Walters's 2001 The Impact of Category Management on Retailer Prices and Performance laid out the practice and showed how it moves retail prices and category profit. Here the thing referred to is an organisational routine for governing a category, and it is wider than the space-elasticity coefficient and the physical planogram, which it takes as inputs: the same shelf-space problem seen as a management process rather than as a number or a picture.[3]

Unit

One category run as a jointly planned business unit by retailer and supplier

Recovery means

Not applicable

Measured by

Assessed by category sales, margin, and price outcomes before and after the practice is adopted

The planogram proper is the visual diagram that fixes exactly where each product sits on a fixture: which shelf, which position, and how many facings, so that an abstract space allocation becomes a concrete, buildable layout a store can put up and audit. Hübner and Kuhn's 2012 review Retail category management surveyed the optimisation models and commercial software that generate these layouts, and noted the gap between the academic models and the simpler rules the software actually uses. Here the thing referred to is the placement diagram and the operations tooling that produces it, the tangible output of the same shelf problem that space elasticity measures and category management governs.[4]

Unit

One shelf-by-shelf placement diagram for a fixture or category

Recovery means

Not applicable

Measured by

Evaluated by compliance audits and by the sales and space productivity of the built layout