The document discusses how design artifacts can be used as service design concepts to help communicate new mobile service offerings to users and stakeholders. It presents a case study where two visualizations ("cloud" and "stairs") were created and evaluated to represent a new shared mobile plan for families. User interviews provided feedback that the visualizations helped envision the offering, identify new needs, and suggest changes to better balance user and business requirements. The study demonstrated how design artifacts can engage stakeholders, support the design process, and allow user needs to be considered early in service development. Future work is needed to define qualities of design artifacts that facilitate stakeholder and user participation.