For years, retailers have been caught in a tug-of-war between two competing forces: the desire to provide an exhaustive variety of products and the economic necessity of optimizing inventory through SKU rationalization. Most are searching for “Variety Nirvana”—that perfect balance where a store has enough different items to satisfy the shopper without becoming economically inefficient.

Bringing Consumer Perspective into the Mix 

The problem is that “variety” is often a matter of perception rather than math. James Sorensen of Burke Research notes that the most critical distinction for a shopper is between Horizontal and Vertical variety.

• Horizontal Variety (The Multi-Brand Trap): This is having 10 different brands of yellow mustard on a single shelf. Unless there is a distinct functional difference between them, shoppers perceive this as redundant “clutter” rather than a meaningful choice.
• Vertical Variety (The Depth Advantage): This involves carrying only one or two leading brands but offering every possible flavor or size—think 15 flavors of Oreos.

Shoppers generally perceive Vertical Variety as “better” variety, Sorensen avers. It makes the retailer look like a specialist who understands their specific needs, rather than a warehouse just “filling space” with competing logos.

Dr. Barbara Kahn of the Wharton School adds another layer to this: variety is a “cognitive shortcut”. When a retailer organizes a shelf by benefit (e.g., gluten-free, low sugar, locally produced) rather than by brand, the shopper walks away with a much stronger sense of variety. This aligns with Siemon Scamell-Katz’s finding that extended variety isn’t the problem—poor organization is.

If the choices are delineated clearly, the shopper can navigate even a dense selection without hitting the “Paradox of Choice” described by Barry Schwartz, where too many options often diminish sales.

Moving Towards Shopper Centric Variety Nirvana

I often wonder if the research clearly points toward fewer brands and better organization, why are shelves still so cluttered?  Part of the answer could be the often the “pay-per-slot” economic model. Retailers have built reliable revenue streams by charging brands for shelf space. While this is great for the bottom line in the short term, it creates a landing place for unnecessary items that often end up being delisted, that force the shopper to navigate through “noise” to find the right item on their list. 

Not surprisingly, to solve this, many retailers are turning to AI and programmatic systems to de-mystify what “optimal variety” actually looks like. Some are moving away from the “one shelf fits all” approach toward a hyper-localized model. With AI as an additional tool, the important findings of shopper research, local and timely trends, demographics and even competitive information can drive the ultimate localized shelf set. 

As a result, these systems allow retailers to smartly reduce the width of their assortment (fewer redundant brands) while increasing the depth of the items that actually matter to that specific community.

New Information Requires a New Approach and Success Metrics

The journey toward Variety Nirvana requires a fundamental shift in the retailer’s identity. With this new approach, variety is no longer just a procurement strategy; it should be considered an in-store visual communication strategy that enables shoppers to appreciate variety while being efficient. 

Brands and retailers who continue to think about variety in the traditional number-count paradigm are going to be challenged to measure success in a different way to full embrace the power of localized approach.  Instead of short-term sales and maximizing trade dollar budgets, begin to measure the economic benefit of selling more to relevant shoppers with less promotion, less discontinued item markdown and constant labor-intensive shelf re-sets. 

By embracing AI-driven hyper-localization and shopper-centric shelf sets, retailers can finally stop choosing between economic prudence and shopper satisfaction. Nirvana isn’t found in the number of items on the shelf—it’s found in the speed at which a shopper can look at a selection and say, “They have exactly what I was looking for.”.