Assortment renewal represents the differential in number of products (GTIN) between your product innovation and attrition, i.e. the difference between the number of new products and the number of inactive products. The indicator measures the evolution of your assortment width in number of products.
Assortment renewal = Innovation in number of GTINs - Attrition in number of GTINs
For a market consisting of 2,000 products:
200 products have no sales in your analysis period, but were sold in the same period the previous year, these 200 products represent assortment attrition.
400 products have sales in your analysis period, but were not sold in the same period the previous year, these 400 products represent assortment innovation.
Range renewal = 200 = (400 - 200)
Renewal assortment indicator can be translated into English as "Renewal products assortment" or RPA.
Product assortment renewal can also be studied in value or volume sales, to measure the impact of product renewal on sales.
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