Shelf Position and Sales Velocity: What the Data Shows in Lagos Supermarkets

The retail industry term for shelf position is "planogram compliance", and it is one of the most studied variables in consumer goods marketing. Decades of eye-tracking research and sales data analysis across global markets consistently show that product visibility at the point of purchase is a primary driver of purchase decisions, particularly for categories where the consumer does not arrive at the store with a specific brand commitment.

In Nigerian supermarkets, where impulse purchasing is high and brand loyalty in many categories is still forming, shelf position has an outsized effect on velocity. The difference between eye-level placement and floor-level placement for the same product, same price, and same promotional support can be 50–65% of sales volume. That is not a marginal effect. It is the difference between a product that performs and a product that does not cover its listing costs.

DALA field data from Lagos modern trade accounts, aggregated across multiple categories and outlet types, shows the following sales velocity relativities by shelf level, with eye-level performance set as the baseline index of 100.

The top shelf performs even worse than the floor in most Nigerian supermarket contexts, because ceiling heights mean the top shelf is often above the comfortable sightline of the average Nigerian shopper. Products placed there are effectively invisible unless the consumer is already searching for them by name.

Not all categories show the same shelf sensitivity. Products in categories with high brand loyalty and deliberate purchase behaviour, for example specific infant formula products or prescription-equivalent health foods, show lower shelf sensitivity because consumers actively search for them. Products in impulse categories, carbonated drinks, biscuits, confectionery, and snacks, show the highest shelf sensitivity because the purchase decision is often made at the shelf based on what is visible.

For brands in high-impulse categories, the investment required to secure eye-level positioning, whether through trading terms, promotional fees, or relationship management, should be evaluated against the velocity benefit data. If moving from floor to eye level generates a 57% increase in velocity, the incremental revenue from that uplift needs to be compared against the cost of securing the better position. In most cases for fast-moving products, the return on eye-level investment is strongly positive.

Shelf positions are not static. Store staff reorganise shelves during restocking, competitors negotiate for better positions, and new listings displace existing products. Without regular field visits to verify that your brand is in its agreed shelf position, position erosion happens gradually and often goes unnoticed until sales data reveals the decline months later.

DALA's field representatives verify shelf position compliance on every store visit, log any deviations from the agreed planogram, and engage with store managers to restore correct positioning. This active shelf position management is part of what sustains the 88–94% on-shelf availability performance across the DALA network, since position erosion and stock-level issues are often related.