This document discusses using Redmine as a ticketing system for service level agreements (SLAs). It begins with defining key terms like tracker, tracked, and project. It then outlines important considerations for implementation like authentication, privacy and availability. The remainder of the document provides steps for implementing Redmine as a helpdesk ticketing system, including customizing data entry and notifications, configuring SLA features, and generating reports. Mobile access and examples of common SLA metrics like average speed to answer and first call resolution are also covered.