The Service Catalog is the single source of truth for all operational services offered to customers. It is a customer-facing document that provides a clear, consistent, and accurate view of available services, including descriptions, service level targets, costs, and how to request them. By publishing the service catalog, the data center organization formally presents its offerings, enabling customers to understand what is available and to place orders accordingly. The service portfolio, in contrast, is a broader, internal tool that also includes services in development and those that have been retired.

A. The service portfolio is an internal management tool that includes retired and pipeline services, not just what is orderable now.

B. A business continuity plan is an internal, often confidential, document for disaster recovery, not a customer-facing service offering.

C. A needs analysis report is an internal document used during the service design phase to understand requirements, not to announce services.

1. ITIL® Foundation, ITIL 4 Edition, Axelos, 2019. Chapter 4.5, "Service catalogue management," defines the service catalog as the source of information on all services and service offerings for users.

2. University of Washington, IT Connect, "IT Service Management - Service Catalog." Courseware and documentation describe the service catalog as the "storefront" where customers can shop for and order IT services.