One of the five major aspects of Service Design is the design of the service solutions. It includes?

ITIL Service Design defines the design of service solutions as encompassing the agreed requirements, the resources needed to deliver the service, and the capabilities required to support it - all three elements must be addressed together for a complete service solution design.

Requirements alone are insufficient - service solution design must also include the resources and capabilities needed to actually deliver and support the service.

Capabilities alone omit the foundational requirements driving the design and the resources necessary to fulfill the service.

Resources and capabilities without agreed requirements lack the business and service context that defines what the solution must achieve.