This document discusses metrics in an agile environment. It notes that traditional metrics were designed for a linear world but product development is complex and unpredictable. Instead of trying to control outcomes, we can observe and learn from results to continually improve. The document outlines several types of metrics that can provide insights into business outcomes, product quality, processes, and team health/maturity without attempting to over-control the system. These include metrics like lead time, throughput, work in progress, technical debt, and happiness indexes. Cumulative flow diagrams and control charts are also discussed as ways to visualize workflow and identify improvement opportunities.