There are many statistical techniques for developing market segments.
Once the firm has identified its market-segment opportunities, it must decide how many and which ones to target.
Marketers are increasingly combining several variables in an effort to identify smaller, better-defined target groups. Thus, a bank may not only identify a group of wealthy retired adults but within that group distinguish several segments depending on current income, assets, savings, and risk preferences. This has led some market researchers to advocate a needs-based market segmentation approach.