目的 双钻石模型作为常用的服务设计流程，在定义阶段需对前期发现的问题进行聚焦，对设计师的经验和能力有较高要求。探索是否有工具可以帮助设计师更准确地完成服务定义，从而更好地引导后期的设计展开。方法 在双钻石流程中引入价值主张设计环节，提出服务设计“领结模型”，并通过关注社会福祉的“春墅”社区康养服务设计案例说明设计过程。结论 加入了价值主张设计环节的“领结模型”，能够帮助设计师进行更有效的问题聚焦与设计方向制定，从而减少服务设计流程中发展和迭代阶段的不确定性。

As a commonly used service design process, the Double Diamond Model needs to focus on the problems discovered in the early stage of definition, which requires a high level of experience and ability from designers. The work aims to explore whether there are tools that can help designers more accurately complete service definition, thereby better guiding the subsequent design. The value proposition design was introduced into the Double Diamond process and a service design "Bow-tie Model" was proposed. The process of value proposition design was demonstrated through a case study of "CHUNSHU" community health and wellness service design focusing on social welfare. The "Bow-tie Model" with value proposition design process can help designers focus on problems and establish design directions more effectively, thereby reducing uncertainty in the development and iteration stages of the service design process.