8fcb62ec_rics___Introduction___FT_Press__Considerations
[0] 2.3 [Metric] Brand Development Index [Construction] Brand sales in a specified segment, compared with sales of that brand in the market as a whole. [Purpose] Regional or segment differences in brand purchases and consumption. [Considerations] 
Can use either unit or revenue sales.
Marketing Metrics: Understanding Market Share and Related Metrics | Introduction | FT Press
Considerations