To use service innovation tools for social change, it is important to follow some steps and principles to guide you through the process. Firstly, define your social purpose and vision; what is the problem or challenge that you want to address, and what is the change that you want to create? Secondly, conduct service research; who are your customers and stakeholders, what are their needs and expectations, and what are the opportunities and constraints of the service context? Thirdly, ideate and co-create service solutions; how can you generate and select ideas that are relevant, feasible, and viable, and how can you involve your customers and stakeholders in the co-creation process? Fourthly, prototype and test service solutions; how can you build and test prototypes that simulate the key aspects of your service, and how can you collect and analyze feedback from your customers and stakeholders? Fifthly, implement and scale service solutions; how can you launch and deliver your service, and how can you scale and sustain it over time? Lastly, evaluate and communicate service impact; how can you measure and report the social value and impact of your service, as well as share your learnings with customers and stakeholders?