The division of unit costs by the size or weight of the object leads to the concept of value density, that is, product value per kilogram or cubic meter. Digitally transmittable items have a value density approaching infinity. Value density plays a central role in the design of value-added networks. See here also Section 2.4.1 and [Senn04]. It is a challenge is, for example, if low-cost services are to be provided for non-transportable objects. This is the case with services for plants that have been installed worldwide. In designing the services, the proportion of services that can be transmitted digitally is particularly important.