What it means
A retailer with a wide variety stocks many categories, brands and sizes, while a specialist focuses on a narrow line. The same idea applies to a manufacturer with many product versions, a restaurant with a long menu or a software company with many pricing plans.
The attraction is easy to see. More choice means more customers can find what they want, and a wide range can raise the average amount each customer spends.
Shoppers who find everything in one place may also return more often. The costs are less visible.
Each extra product, often called a stock keeping unit or SKU, needs to be bought, stored, tracked and sometimes marked down, and slow sellers tie up cash in inventory. Production runs get shorter, set-up costs rise and forecasting becomes harder.
Finance managers test variety with product-level profitability. They look at sales, gross margin and inventory carrying cost for each item or group, and they ask whether each addition earns more than it costs.
A common finding is that a small share of products produces most of the profit, and the long tail of slow sellers adds cost without much return. There is no single right answer.
Some businesses, such as large supermarkets and online marketplaces, make a wide variety their core promise, while others, such as discount grocers, succeed with a deliberately narrow range and lower costs. Variety should also be looked at over time.
A range that suited a business at one stage of growth can become too complicated later, so regular reviews that remove weak products are part of healthy management.
In practice
Real-world examples.
Example
A hardware store adds 150 new items, including specialist fittings and garden tools. Sales to professional customers rise because they can buy everything in one visit. The owner checks that the new lines earn enough margin to cover the stock they tie up. After six months, he drops the dozen slowest items and keeps the rest.
Example
A restaurant with a 90-item menu cuts it to 35 dishes. Food waste falls, the kitchen works faster and the cost of ingredients drops. Sales dip slightly, but profit rises because costs fall by more.
Example
A software company offers customers twelve different subscription plans. The sales team struggles to explain the options and invoices become error prone. The company reduces the number to four plans and sees fewer billing disputes. Support calls about which plan to choose also fall noticeably.
Formula
Calculation
Net benefit of added variety = (Extra sales x Gross margin %) - Extra inventory carrying cost
Inventory carrying cost = Average inventory value x Carrying cost rate
A shop widens its range from 400 to 600 products. Annual sales rise from $2,000,000 to $2,300,000, so extra sales = 2,300,000 - 2,000,000 = $300,000. At a gross margin of 30%, the extra gross profit = 300,000 x 30% = $90,000. Average inventory rises from $240,000 to $390,000, and the carrying cost rate is 25% a year. Carrying cost rises from 240,000 x 25% = $60,000 to 390,000 x 25% = $97,500, an increase of $37,500. Net benefit = 90,000 - 37,500 = $52,500 a year, before extra staff and space costs.Case study
Seen in the real world.
Greenfield Pantry is an illustrative, fictional online grocer that built its reputation on offering 12,000 products. Its operations team found that the slowest 3,000 products produced only 2% of sales but occupied 15% of warehouse space.
The finance manager calculated that those 3,000 products carried average inventory of $450,000 and a carrying cost rate of 20%, which meant 450,000 x 20% = $90,000 a year. They also generated only $60,000 of gross profit in total.
In the illustrative result, the company removed 2,000 of the weakest lines and kept the rest as a convenience for loyal customers. The change saved about $60,000 of carrying cost and freed space for faster products, while the wide variety that customers valued stayed in place.
Watch out
Common mistakes.
- Assuming that more choice always increases sales, when too many options can confuse customers and slow decisions.
- Counting only the extra sales from new products and ignoring inventory, storage and handling costs.
- Keeping slow products out of habit, when product-level profit analysis often shows they lose money.
Questions
People also ask.
How can a business measure whether its range is too wide?
It can compare sales, margin and stock holding for each product group and look for items that earn less than they cost to carry.
Is a wide variety only relevant to retailers?
No, manufacturers, restaurants and software companies all face the same trade-off between choice and complexity.
What is a long tail of products?
It is the large number of slow-selling items that each contribute little, but together can take up a lot of space and cash. Some businesses keep it deliberately because it attracts customers who then buy faster-moving items too.
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