brand development index definition
Brand Development Index. Definition: Brand Development Index. The Brand Development Index is an index that relates the percent of a brandâs sales in a market to the percent of total market. The brand development index measures the relative sales strength of a brand within a specific market.
BDI and CDI are indices comparing the relative strength of a market to overall sales. The Brand Development Index (BDI) is an index compared to overall brand sales. The Category Development Index (CDI) is an index compared to overall category sales. Like any index, a score of 100 is average. The formulas are simple: BDI = (% Market Brand Sales / % Market Population) x 100.