The service blueprint is a detailed visualization of how all of your service components come together, from front-end public facing activities to back-end service delivery activities.
A service blueprint is a visualization method, but is also an idea-generating tool, whereby innovation team members can look for service gaps an opportunities.
Blueprints are more technical and detailed than Journey Maps, which focus more on the emotional journey of a service user or service agent. They can include a very wide range of columns, and these columns will largely depend on the nature of the organization using them, and the type of project at-hand.
Blueprints should be designed at the beginning of a project to help bring all aspects of the service journey to the surface of the innovation team's consciousness, and then re-visited throughout later stages as new questions, service propositions, and insights arise.