The DMU is consequently defined as an organized set of information, reflecting the different needs of the design teams, and structured according to a Product Structure. The Product Structure is mainly the core structure describing and managing how the drawing sets (when considering the output for manufacturing) are organized. It is also one of the key enablers of Configuration Management. From a technology perspective, the DMU relies on techniques similar to Virtual Reality. Thus it is possible to “navigate” in the DMU, to explore selected design areas