This document discusses service design in ITSM and how to align business services with enterprise architecture. It provides definitions of key terms like enterprise architecture, IT service management, and service catalog. It describes modeling business, application, and technology services in different layers. The document outlines steps to define a service, including identifying business objectives, setting attributes with owners, integrating data sources, and automating data reconciliation. It also discusses service relationships, attributes, ownerships, and using ServiceNow for service management.