This document outlines methods for validating customer concerns, including conducting interviews, focus group discussions, and surveys. It discusses interviewing existing customers, evaluators, and potentials to understand their problems. Focus groups allow an interactive discussion moderated by asking questions. Surveys can be conducted via telephone, direct mail, or online to get customers' perspectives. The document also provides steps for identifying and validating market problems, such as asking the right questions, listing target market problems, interviewing decision makers, building a database to analyze trends, and validating stated problems are real concerns.