According to the PMI Guide to Business Analysis, user acceptance testing is a technique that involves

verifying and validating that the solution meets the business requirements and satisfies the

stakeholder needs and expectations. User acceptance testing is usually performed by the end users

or their representatives, who evaluate the solution against predefined acceptance criteria and

provide feedback on its functionality, usability, performance, quality, etc. User acceptance testing can

help to determine whether a solution satisfies business requirements, as it can demonstrate that the

solution delivers the intended business value and benefits, and that it meets or exceeds the

stakeholder satisfaction. By reviewing the results of user acceptance testing, a business analyst can

assess how well the solution meets business requirements, and identify any gaps or issues that need

to be addressed or resolved. Evaluating the solution against the project charter, conducting a

brainstorming session with end users, or reviewing the traceability matrix are other ways to analyze

and validate requirements, but they do not necessarily determine whether a solution satisfies

business requirements, as they do not involve testing or evaluating the solution in real or simulated

conditions. Reference: PMI Guide to Business Analysis, page 317-318.