STORY: Joseph Brooks, 'You Light Up My Life' Songwriter, Commits Suicide Awaiting Trial. Brooks and Cachay were introduced by a friend in 2010 but were constantly on-again, off-again. Cachay didn't like that they would drink too much together, her friends testified.
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.
Category Development Index. Category Development Index (CDI) measures the sales performance of a category of goods or services within a specific group, compared with its average performance among all consumers. By definition, CDI measures the sales strength of a particular product category within a specific market (e.g., soft drinks in 10â50 year old's). 1 Purpose.