Who? Who are current and potential customers of the same customer group? What are the demographics, psychographics, and geographics? Is the buyer the user? Who influences the purchasing decision?
How many? How many customers does the company serve? How many does it have the capacity to serve?
Where? Where are products purchased? Where do customers buy the products? What are the types of intermediaries? What is the influence of electronic commerce? Where are customers doing non-store buying-Home Shopping Network, catalogs, Internet?
When? When are the products bought? What is the frequency of purchasing? Do promotional events affect purchase? How do differences in physical or social environment, time demands, or purchase task affect buying?
How and What? What are the basic need-satisfying benefits? Does a competitor's product fit a need this product/service does not provide?
What are changes in customers' needs? How do the customers pay-cash, credit?
Why Are There Non-Customers? Needs not met? Bad fit for lifestyle/image? Price? High switching costs? Competition's product is better? Poor distribution? They do not know about the product?