Data Purl
  • Platform
  • Solutions
  • Coverage
  • Custom data
  • Research
  • Data
  • Methodology
Client loginTalk to the foundersStart free
  • Platform
  • Solutions
  • Coverage
  • Custom data
  • Research
  • Data
  • Methodology
  • Start free
  • Talk to the founders
  • Client login
  1. Home
  2. /Glossary
  3. /Assortment rationalization
Glossary

What is assortment rationalization?

A deliberate reduction in the number of products a brand or retailer offers, often called SKU rationalization.

Definition

Assortment rationalization is the removal of slower-selling or overlapping products to simplify a range, reduce inventory and improve margins. It shows up as a sustained fall in assortment count.

How Data Purl measures it

Data Purl tracks active product counts and delistings (last-seen dates) weekly by brand, retailer and category, so a planned range reduction can be distinguished from temporary stock-outs.

Why it matters

Rationalization can support margins but may signal lost shelf space if it is retailer-driven. Watching which categories are cut, and at which retailers, separates the two.

Related

Assortment countShare of shelf (online)New-product share
  • Detecting assortment cuts and SKU rationalization

See the data for your coverage

Start free in the analytics portal, or talk to the founders about the full dataset delivered to Snowflake or S3.

Start free Talk to the founders
Data Purl

Data Purl turns public retailer websites into investment-grade data: SKU-level price, discount, availability and assortment history across 400+ retailers back to 2013, with brands resolved to their owners, public or private, and listed owners mapped to tickers.

+44 20 8125 3010 (UK)+1 212-660-0780 (US / International)

Product

  • Platform
  • Coverage
  • Retailers
  • Custom data
  • Methodology
  • Compliance

Solutions

  • Public market investors
  • Private equity
  • Consultants
  • Investment banking M&A
  • Venture capital

Use cases

  • Pricing power
  • Markdowns and inventory
  • Commercial due diligence
  • Brand distribution
  • Category inflation
  • Portfolio monitoring
  • Tariff pass-through
  • Holiday promotions
  • Private label
  • Assortment cuts
  • Earnings previews
  • Product launches

Resources

  • Research
  • Shelf Indices
  • Use cases
  • Glossary
  • FAQ
  • About
  • Start free
  • Talk to the founders
400+
retailers
1,900+
public companies mapped
4,000
product categories
2013
history back to

© 2026 Data Purl. All rights reserved. Data Purl is a trading name of Cleveland Alternative Data Limited, a company registered in the United Kingdom with company number 16234509.