The marketing plan that has a feedback cycle, from 8th stage back to the 4th. That is because sometimes during the planning process, we might need to perform stages 4 to 8 several times before the final plan can be written.
Most of your marketing research will fit into 5 or 6 categories: Surveys, Focus Groups, Interviews, Observations, Secondary Research, or Experiments/Field Trials. We will not go into specifics for each research category on this particular blog. Regardless of the marketing research methods that are used, you need to uncover who your customers are or will be, you need to uncover what the demand is for your products or services, you need to know every competitor in the marketplace, and you need to know the market share for each company in your industry categories.