The document discusses how involving three roles - the Business-oriented Business Analyst, System Analyst, and Product Owner - can help achieve project success when developing business solutions. It describes the domains and responsibilities of each role. The Business Analyst focuses on business needs, requirements validation, and transition requirements. The System Analyst focuses on technical solution requirements and non-functional requirements. The Product Owner leads the product, understands how pieces fit together, and is the single source of requirements for developers. Involving these three roles ensures the business problem is understood, requirements are clear and validated, and the solution fits together as a coherent product.