This document discusses tools to support continual service improvement (CSI) activities. It defines CSI as a process under ITIL's CSI process group that is used to define initiatives to improve service and process quality based on results from other ITSM processes. The document explains that there are three types of metrics needed to support CSI: technology metrics related to components and applications, process metrics around critical success factors and KPIs, and service metrics that measure end-to-end performance using individual technology and process metrics. It provides examples of each type of metric and describes how metrics are measured and used within specific domains.