The document discusses service blueprints, which are diagrams that map out the key processes and touchpoints involved in delivering a service. It provides an example blueprint for a parcel delivery service that is broken into three acts. The first act maps the front stage interactions between customers and employees when collecting parcels. The second act shows the back stage handling and transportation of parcels between regional hubs. The third act outlines the final delivery of parcels to customers from regional hubs. Service blueprints are used to identify potential fail points in a service process.