Which method is commonly used to evaluate a product's success after it has been launched?

Customer feedback surveys are a widely recognized method for evaluating a product's success after its launch. They allow companies to gather direct insights from users about their experiences, satisfaction levels, and any issues they may encounter while using the product. This feedback is invaluable as it can highlight strengths and areas for improvement, guiding future iterations or product enhancements.

Surveys can reach a broad audience and can be designed to target specific aspects of the product, such as usability, functionality, and overall satisfaction. By analyzing the survey data, companies can measure success against predefined goals, understand customer needs better, and ultimately make informed decisions to enhance the product or inform future developments.

In contrast, focus group discussions offer qualitative insights but may not capture a broader viewpoint or quantifiable trends. A market research report typically analyzes broader trends and competitive positioning rather than specific user experiences with a single product post-launch. Prototype testing, while important in the development phase, does not evaluate the success of a product that is already in the market; instead, it focuses on assessing feasibility and user experience before a product's release.