Focus group studies are a qualitative research method that gathers feedback from customers about their perceptions and experiences with a product or service. This method is particularly useful for measuring perceived quality because it allows for in-depth discussions and insights into customer attitudes and satisfaction, which are not easily quantifiable through other means such as failure reports or capability tests. While analyzing field failure reports, reviewing capability tests, and monitoring warranty claims can provide data on the actual quality and reliability of a product, they do not capture the customer’s subjective experience and perception of quality. Focus group studies enable a company to understand the customer’s voice, which is essential for measuring and improving perceived quality.