Assortment Breadth vs Depth: How to Compare Competitor Furniture Ranges

Two furniture retailers may each list 500 products and still have very different ranges.

One may spread those products across living, dining, bedroom, office and garden furniture. The other may concentrate most of its choice in sofas, with many sizes, configurations, fabrics and price positions.

The total count is the same. The assortment breadth and depth are not.

That distinction helps buyers, merchandisers and category managers understand the shape of a competitor’s offer. It can reveal whether a retailer is entering more product roles, building more choice within an existing role or simply creating more variants of products it already sells.

It does not reveal sales, demand, margin or whether the range is successful. Public assortment evidence shows what is offered, not how customers respond.

What Do Assortment Breadth and Depth Mean?

In this context:

• Breadth is the number of meaningfully different categories, product roles or customer needs covered by the range.
• Depth is the amount of meaningful choice within one of those categories or roles.

A furniture retailer with sofas, beds, dining tables, desks and garden seating has broader coverage than a sofa specialist. The specialist may have greater sofa depth if it offers more credible choices within modular, compact, recliner, sofa-bed and family-seating roles.

Retail assortment research commonly treats variety, depth and service level as separate planning decisions. That separation matters because “more products” is not a strategy on its own.

The practical question is:

Is the competitor adding new reasons to shop across the range, or more ways to satisfy needs it already serves?

Choose the Unit Before You Count

Breadth and depth are only comparable when the team agrees what counts as a category, a product family and a distinct choice.

Retail websites rarely use the same taxonomy. One retailer may place corner sofas, modular sofas and chaise sofas in separate categories. Another may group them all under “sofas”. Counting navigation labels would make the first retailer appear broader even if the underlying product roles were similar.

Build a common comparison taxonomy before collecting totals. For example:

Use the same rules for every competitor and every review date. If the taxonomy changes halfway through the analysis, recalculate the earlier snapshot or record the break clearly.

Avoid Raw SKU Inflation

Raw product counts can make depth look larger than it is.

A single sofa family may appear as:

• a two-seater and three-seater;
• left-hand and right-hand chaise configurations;
• ten fabrics;
• several leg finishes;
• separate product pages for each combination.

Those options may be commercially valuable, but they do not necessarily represent dozens of independent product propositions. Another retailer may place the same choices on one configurable product page.

Decide which level the review needs:

• Product-family depth for the number of genuinely different designs or propositions.
• Configuration depth for distinct sizes, layouts or functions.
• Finish depth for materials and colours.
• Page or SKU count only when the publishing structure itself is relevant.

Do not mix these levels in one comparison. If one competitor is counted by product family and another by visible variant page, the result mostly measures website structure.

Define a Comparable Scope

Start with a clear boundary rather than comparing entire sites.

Record:

• the competitors included and why they are relevant;
• the departments or categories covered;
• the common taxonomy used;
• whether discontinued, unavailable or repeated products are excluded;
• how bundles, sets and configurable products are treated;
• the observation date or review period;
• known coverage limitations.

The guide to choosing competitors and categories to monitor can help define a focused competitor-category set. A very broad retailer should not automatically become the benchmark for every furniture specialist.

Where coverage is incomplete, label the comparison as a sample. Do not turn a partial category view into an authoritative claim about the retailer’s complete range.

Measure Breadth in Meaningful Layers

Breadth can be measured at more than one level.

Department breadth

How many broad areas does the retailer cover: living, dining, bedroom, office, storage, children’s furniture or garden?

This is useful for understanding whether the business presents itself as a specialist or a whole-home destination. It is too coarse for most buying decisions.

Category breadth

Within a department, which distinct categories are present? Living-room breadth might include sofas, armchairs, coffee tables, side tables, TV units and bookcases.

Product-role breadth

Within a category, which customer needs are served? Sofa breadth might include compact, modular, recliner, sofa-bed and deep-seat roles.

This is often the most useful level for a merchandising comparison because it separates a new proposition from another variation of an existing one.

For each level, count presence consistently. A category with one credible product and a category with fifty products each contributes one unit of breadth at that level. Depth is measured separately.

Measure Depth Without Losing Meaning

Depth asks how much relevant choice exists inside the selected category or role.

Useful dimensions include:

• distinct product families;
• sizes and configurations;
• materials or upholstery types;
• styles and design directions;
• functional features;
• entry, core and premium price positions;
• delivery or service propositions, where they are publicly comparable.

Do not add every dimension into one unexplained score. A retailer may be deep in fabric choice but shallow in sizes. Another may offer many designs with only two finishes each.

A simple depth table is usually clearer:

The table should describe the observed range. It should not imply that the deepest column is automatically the strongest commercial offer.

Recognise Four Different Range Shapes

Breadth and depth create four useful patterns.

Broad and shallow

The retailer covers many categories but offers limited choice inside each one.

This may support a one-stop-shop proposition, but public listings alone cannot show whether the coverage is productive or sufficient for customers.

Narrow and deep

The retailer concentrates on fewer categories and offers substantial choice within them.

This can signal specialist focus, but it can also include redundant variants. Test whether the depth represents meaningful customer choices rather than repeated products.

Broad and deep

The retailer covers many categories and carries substantial choice within them.

This is a large observed assortment, not proof of superior availability, profitability or customer preference. Large ranges can still contain duplication or weak propositions.

Narrow and shallow

The retailer covers few categories with limited visible choice.

That may represent a tightly edited offer, a new category, a temporary range position or incomplete observation. Avoid declaring the reason from the shape alone.

These patterns are descriptions, not rankings. The right shape depends on the customer, brand, supply model and commercial strategy.

Compare Snapshots, Not Just One Moment

One snapshot shows the current observed shape. Repeated snapshots show how that shape changes.

Use the same scope and taxonomy at each review, then ask:

• Were new product roles added?
• Did existing roles gain more families or configurations?
• Did a category become broader while another became shallower?
• Were products added, or were existing pages split into more variants?
• Did a new family replace an old one rather than increase depth?
• Did the apparent change persist at the next review?

This article is concerned with the shape of the range. The catalogue-churn guide covers the separate question of how often products disappear, return or cycle through the catalogue.

Keep both views. A category can have stable depth while the individual products inside it churn heavily. It can also gain genuine depth through several persistent additions.

Distinguish Expansion From Substitution

Suppose a competitor adds four dining-chair families.

If the existing families remain, observed depth has increased. If four older families disappear at the same time, the range may have been refreshed without becoming deeper. If all four additions are colour variants of one design, the family-level depth may barely change.

Classify the movement:

• Breadth expansion: a new category or product role appears and persists.
• Depth expansion: meaningful choice increases inside an existing role.
• Substitution: new products replace previous ones without materially changing range shape.
• Consolidation: breadth or depth reduces through removals or merged propositions.
• Presentation change: navigation, URLs or variant structure changes while the underlying offer remains similar.

Do not infer why the competitor made the change. Public evidence rarely establishes whether it reflects demand, supplier terms, stock, margin or a deliberate strategic shift.

A Hypothetical Furniture Example

Imagine a sofa-led retailer comparing two relevant competitors using the same living-room taxonomy.

Competitor A covers sofas, armchairs, coffee tables, side tables, TV units and bookcases. Each category contains a small number of product families. Its observed range is relatively broad and shallow.

Competitor B covers only sofas, armchairs and footstools. Within sofas, it has several persistent compact, modular, recliner and sofa-bed families with multiple configurations. Its observed range is narrower and deeper.

The retailer should not ask which competitor has the “better” assortment. It should ask what each comparison is useful for:

• Competitor A may help review whole-room category coverage.
• Competitor B may provide a stronger reference for sofa-role depth.
• Neither range proves what the retailer’s own customers want.

At the next review, Competitor A adds a stable desk-and-office-chair category. That increases breadth. Competitor B adds two modular families while retiring two older ones. That may be substitution rather than additional depth.

The distinction prevents a simple product-count increase from being mistaken for a strategic conclusion.

Turn the Comparison Into Better Questions

An assortment-shape review should create questions for the business, not automatic buying instructions.

Useful questions include:

• Are competitors covering a product role that our customers repeatedly ask for?
• Is our own range deep in variants but shallow in genuinely different propositions?
• Are several families serving the same need without clear differentiation?
• Does a competitor’s broad coverage change how customers may perceive our specialist position?
• Is a new category persistent enough to deserve investigation?
• Which apparent differences disappear after normalising variants and taxonomy?

If the comparison reveals a possible unmet customer need, use the assortment-gap analysis framework. That separate process tests the candidate against customer evidence, strategic fit, economics and operational feasibility.

If the change began with a newly observed collection, the new-product range review helps assess that launch without assuming it will succeed.

Common Mistakes to Avoid

Treating website categories as a common taxonomy

Navigation is designed for each retailer’s customers and platform. Normalise it before comparing.

Counting every visible variant as a separate product

Record variants, but keep product-family and configuration depth separate.

Using totals without denominators

State which competitors, categories and dates the count covers. “Twenty more products” is meaningless without the comparison boundary.

Assuming more choice means better performance

Range size does not reveal sales, conversion, margin, availability or customer satisfaction.

Comparing unstable snapshots

A temporary listing change can distort the result. Use repeated observations and record incomplete coverage.

Copying the competitor’s shape

Their breadth and depth reflect a business you cannot see in full. Use external evidence to challenge your own assumptions, then decide using your customers and economics.

How Fido Supports the Review

Fido can help collect scheduled product and category evidence from supported monitored competitors. The underlying platform records product-category relationships and historical category membership, which can support repeated views of observed catalogue shape.

That evidence still needs a human comparison framework. Fido does not automatically guarantee equivalent product matching, define a universal cross-retailer taxonomy, prove demand or recommend the right assortment.

A practical process is:

1. choose the relevant competitors and category scope;
2. define one common hierarchy and variant rule;
3. create a dated breadth-and-depth snapshot;
4. repeat the snapshot using the same method;
5. classify expansion, substitution, consolidation or presentation change;
6. test any potential own-range decision with internal evidence.

The Takeaway

Assortment breadth and depth turn a raw product count into a more useful picture of range shape.

Breadth shows how many different categories or customer needs a competitor covers. Depth shows how much meaningful choice it offers within them. The comparison becomes credible only when competitors share the same scope, taxonomy, variant rules and review dates.

Use the result to ask better merchandising questions. Do not use it to infer sales, demand or strategy that public product listings cannot prove.

Sources

• Journal of Retailing: Why Is Assortment Planning So Difficult for Retailers?
• NielsenIQ: Exploring Category Management Processes, Steps and Business Benefits
• Circana: Is Assortment Affecting Your Market Share?