Explanation
Benchmarking is a technique for comparing the performance or practices of an organization with those of other organizations, usually considered to be the best in the field. It is not a technique for identifying the solution approach, which is the process of defining the most feasible and appropriate way to implement a change that addresses a business need. The other techniques are useful for identifying the solution approach.
Decision analysis helps to evaluate multiple options and select the best one based on criteria and trade-offs.
Risk analysis helps to identify and assess the uncertainties and potential impacts of the solution approach.
Brainstorming helps to generate and explore diverse ideas for the solution approach. References:
BABOK Guide v3, section 10.17 Benchmarking, section 10.18 Brainstorming, section 10.25 Decision Analysis, section 10.33 Risk Analysis and Management, section 11.2 Define Solution Approach CBAP Handbook, section 5. Review the Exam Blueprint Tips for Earning a Business Analysis Certification, section 4. Leverage a variety of study resources