The document discusses the transition from traditional business-to-business (B2B) and business-to-consumer (B2C) value propositions to a more integrated b2x2y model in service systems, emphasizing the complexity of modern service networks. It illustrates various scenarios like outsourcing and outcome-based contracting that highlight the importance of aligning value propositions among providers, partners, and customers to ensure service satisfaction. The paper also outlines further research directions to enrich understanding of value proposition dynamics in increasingly interconnected service environments.