- The important step towards a comprehensive CAD framework is the development of a suitable, complete design model on which the design system’s components are based. To date, we generally find “island” solutions for different aspects as data and process management, but in future, we need more and more integrated solutions. Only the integration gives us the traceability we need for design planning, to generate parts of the design tool’s code automatically, etc. This paper describes how a suitable Design Task Model can be used to link the Product and Flow Models which are currently separated in most frameworks. Using the PLAYOUT Design Model as an example, we show how the Product, the Task, and the Flow Models may fit together, and we describe a modeling environment that guarantees the development of consistent, integrated models.