What assortment is
Assortment is the set of products a retailer decides to carry in a category, store, or chain. When I ran weekly reporting at a natural-products brand, the single most consequential number on any review deck was how many of our SKUs a banner had agreed to stock. Whole Foods carrying eight of our twelve flavors versus Sprouts carrying five is an assortment difference, and it dictated almost everything downstream.
The word trips people up because it gets used loosely. A category buyer talking about "expanding the assortment" means adding SKUs to the shelf set. A brand manager talking about "our assortment at Kroger" means the specific list of our items that Kroger rings up. Both are right. Assortment is just the answer to one question: which products are on the shelf here?
Assortment is not distribution
Here is the distinction that costs brands the most confusion on a review call. Assortment is a retailer-side count: how many SKUs does this banner carry? Distribution is a SKU-side measure: how widely is this one item sold across the market? They move on different axes, and you need both to read a shelf.
Distribution is usually expressed as ACV, the percent of category dollar volume in stores that carry your item. If you have never had to reconcile an ACV number against a store count, the mechanics are worth a read in what is ACV. The short version: a SKU at 60% ACV is in stores that ring up 60% of the category's sales, regardless of how many total items the brand sells.
So the two answer different questions:
| Concept | Whose view | The question it answers |
|---|---|---|
| Assortment | Retailer | How many of a brand's SKUs does this banner carry? |
| Distribution | Single SKU | How widely is this one SKU sold across the market? |
A brand can have a deep assortment at one chain (every flavor on the shelf) and still post thin distribution on any single flavor (because that chain is small). The reverse happens too: one hero SKU at 80% ACV nationally while the rest of the line sits in a few hundred doors. Distribution is the better headline metric for a single item. Assortment is the better lens for the whole line inside a retailer.
Assortment depth: Whole Foods vs Sprouts
Depth is how many of your SKUs a banner agrees to carry, and the gap between two retailers is rarely subtle. Take a fictional twelve-SKU natural-snack line and look at how two chains treat it.
| Banner | SKUs offered | SKUs carried | Assortment depth | Avg units / store / week |
|---|---|---|---|---|
| Whole Foods | 12 | 8 | 67% | 14 |
| Sprouts | 12 | 5 | 42% | 11 |
Whole Foods carries eight of the twelve, so depth is 8 ÷ 12 = 67%. Sprouts carries five, so 5 ÷ 12 = 42%. That is a real gap, and it changes how you read velocity. Whole Foods is moving 14 units per store per week across a wider set, which means the incremental flavors it added are pulling their weight. Sprouts is moving 11 across a tighter set, which usually means it cherry-picked the top-velocity items and skipped the tail.
That second pattern is the one to watch. A shallow assortment with strong per-SKU velocity is not a problem. It is the buyer doing your SKU rationalization for you, refusing to stock the slow movers. A deep assortment with sagging velocity on the added SKUs is the warning sign, because those incremental facings earn the buyer less per linear foot, and that is exactly the conversation that ends with a delisting at the next category review.
Product mix: breadth, depth, and curation
Product mix is the same shelf read from the retailer's side, and it moves on three axes rather than one. Breadth is how many different categories the store carries. Depth is how many items it stocks inside a single line. Length is the total item count that falls out of the first two. When a buyer says the set is going "narrower and deeper," that is breadth coming down and depth going up: fewer brands, more flavors each.
The archetypes sit far apart, and the curated end publishes its own numbers. Trader Joe's puts its count at roughly 4,000 products. Aldi's US assortment runs in the low thousands. A conventional supermarket is an order of magnitude larger; those counts are not published, so treat them as approximations. Same word on the awning, three different businesses.
| Archetype | Items | Breadth | Depth per line | What it means for a 12-SKU line |
|---|---|---|---|---|
| Curated (Trader Joe's) | ~4,000 | Narrow | Very shallow | One item or none. Winning is binary |
| Hard discount (Aldi) | Low 1,000s | Narrow | Very shallow | Private label owns the shelf |
| Natural specialty | ~20,000 | Medium | Medium | Five to eight items is realistic |
| Conventional supermarket | 30,000+ | Wide | Deep | Room for the tail, if it earns it |
Assortment curation is the deliberate choice to live at the top of that table. A curated retailer is not being stingy, it is running a different model: fewer items means higher velocity per item, simpler replenishment, and more private label. The consequence for a brand is that curated accounts are all-or-nothing. At Kroger you can lose two of twelve flavors and keep the business, and the performance matrix will still show the line as healthy. At Trader Joe's there is usually one slot, and losing it removes the account.
The opposite move has a name too. Scrambled merchandising is a retailer carrying categories outside its original remit, like a drug chain building a full grocery aisle. It widens breadth without adding depth, so a CVS set can list your brand while stocking exactly one item of it.
Any useful assortment analysis has to start here, because the merchandise assortment a banner runs tells you what a distribution win is actually worth before you chase it. Eight items at Sprouts and one item at Trader Joe's can be the same revenue, and they need completely different SKU rationalization logic when it comes time to prune.
Assortment planning and why analysts track it
Assortment planning is the retailer's process of deciding which SKUs earn shelf space in the next reset, and it runs on velocity and margin per facing, not on how much the buyer likes the brand. This is the heart of category management: the buyer is optimizing the whole category's return on shelf space, and your line is one input among dozens.
For a brand-side analyst, assortment is the leading indicator nobody watches closely enough. Distribution losses show up in ACV after the fact, once the SKU is already off the shelf. Assortment changes show up first, in the reset decision, weeks before the ACV number moves. If you track which SKUs each banner carries reset over reset, you see the delisting coming. If you only watch top-line ACV, you find out when the sales already dropped.
The practical move is to maintain a SKU-by-banner grid and refresh it every reporting cycle. Eight SKUs at Whole Foods this quarter, seven next quarter, is a delisting in progress, and it is far cheaper to defend a facing than to win it back.
Where Scout fits
Keeping a SKU-by-banner assortment grid current is tedious manual work when the data lives in separate SPINS exports per retailer. Scout connects your SPINS or retailer data and tracks which SKUs each banner carries over time, so a depth drop at Sprouts or a quiet delisting at a regional natural chain surfaces as a number you can see, not a surprise at the next review. Scout measures and flags the change. It does not negotiate the reset for you.
The short version
- Assortment is the set of SKUs a retailer carries. It is a retailer-side count, not a market-wide one.
- Distribution (ACV) measures how widely a single SKU is sold. Assortment and distribution answer different questions, and you need both.
- Assortment depth varies hard by banner. Whole Foods carrying eight of twelve SKUs while Sprouts carries five is a 67% vs 42% gap that reshapes your velocity read.
- Assortment changes lead distribution losses. Track a SKU-by-banner grid every cycle and you see the delisting before the ACV does.