-----------The ProductSpecification represents a product specification as perceived by the business user and specifies what the marketing operator wants to sell at a functional level (i.e. what are the capacities, which usages are available…).
It can represent:
When the ProductSpecification represents a tangible goods, it is associated with a ResourceSpecification. Corresponding Resources are stored in warehouses or bought to a supplier on demand.
When the ProductSpecification is a non-tangible goods, it is either realized as a CustomerFacingService (when the Service Provider is able to realize it) or bought as a ProductSpecification proposed by a Supplier (when the Service Provider is not able to realize it). For example, a Broadband know-how might be built or bought depending on the location of it.--------