What should business stakeholders and product owners do to ensure a successful discovery and design...

Comprehensive and Detailed Explanation From Exact Extract:

Revenue Cloud project methodology emphasizes that early stages (discovery and design) must:

Identify key business challenges clearly.

Define measurable success metrics and outcomes (for example, quote cycle time reduction, billing accuracy, etc.).

While mapping challenges to features (B) is important, it comes after stakeholders align on what problems they are solving and how success will be measured. Reviewing APIs (A) is a technical task, not the primary responsibility of business stakeholders.