The Brand Development Index, or BDI, is a marketing metric used to measure and track the development of a brand. The BDI score is based on factors such as awareness, consideration, preference, and purchase intent. The higher the BDI score, the more developed the brand is considered to be.

The BDI can be used by marketing professionals to benchmark the progress of their brand development efforts and to set goals for future growth. It can also be used by businesses to assess the strength of their brands relative to competitors.

There are a number of ways to calculate the BDI score, but all methods involve weighting the different factors involved in brand development (awareness, consideration, preference, purchase intent) according to their importance.

The BDI is a useful marketing metric for businesses of all sizes, but it is particularly helpful for small businesses and startups that are in the early stages of brand development. By tracking the BDI score over time, businesses can see how their brand is progressing and identify areas where they need to focus their efforts.