Assortment Rationalisation: Cutting SKUs Without Losing Sales

Assortment rationalisation is one of the most impactful — and most feared — decisions in retail category management. Done well, it simplifies the shopping experience, improves shelf productivity, and frees up space for growth categories. Done poorly, it alienates loyal customers and hands sales to competitors.

The Case for Rationalisation

Research consistently shows that most retail categories carry 20–30% more SKUs than consumers need or want. Excess SKUs create decision paralysis, increase operational complexity, and dilute shelf space from the products that actually drive sales. The 80/20 rule applies with remarkable consistency: 80% of category sales typically come from 20% of SKUs.

The Rationalisation Framework

Effective assortment rationalisation follows a structured process: (1) Establish clear decision criteria — sales velocity, margin contribution, shopper penetration, and strategic role. (2) Identify candidates for removal using these criteria consistently across the range. (3) Assess substitution risk — will removing this SKU drive shoppers to a competitor or to another product in your range? (4) Validate with consumer research before making final decisions.

Managing Supplier Relationships

Assortment rationalisation inevitably creates tension with suppliers whose products are being delisted. Managing these conversations professionally — with clear data, advance notice, and a focus on the category rather than individual brands — is essential for maintaining productive supplier relationships through the process.

Measuring Success

The success of an assortment rationalisation programme should be measured on category sales (not just the delisted SKUs), shopper satisfaction scores, shelf productivity metrics, and operational efficiency gains. A well-executed rationalisation should deliver sales growth, not decline, within 3–6 months of implementation.