Solution Design Document

A Solution Design Document (SDD) is a comprehensive document that outlines the architecture, functionality, and specifications of a digital business solution. It describes the vision, user requirements, technical approach, and implementation details, serving as a blueprint for the development team.

A good SDD functions as a central reference point for all stakeholders involved in the project. It can be shared with business leaders, IT teams, and clients to clearly convey the solution's objectives and implementation plan. It is important that the SDD is a living document that is updated as the project evolves, so that decisions and changes are documented.

Starting Points

• Solution Design Document Template (IBM)
• Technical Design Documentation Best Practices

Key Points

• Presence of a structured SDD in which all core components of the solution are elaborated (business requirements, user personas, functional specifications, technical architecture, integration points, data models, security considerations, etc.).
• The SDD is actively maintained throughout the project: changes in requirements or technical approach are reflected in updates to the document (version control should be applied to the documentation).
• The document is clear and complete enough that an outsider (e.g., a new team member or stakeholder) gains understanding of the solution vision and progress. Any gaps or ambiguities in the SDD are recognized and addressed proactively.