Book excerpt: This guide, written by the APM Risk Specific Interest Group and the APM Earned Value Specific Interest Group, examines in detail the interfaces between two key elements of the APM Body of Knowledge. Project management is sometimes compartmentalised into its discrete elements - product decomposition, planning, scheduling, cost estimating, requirements management, risk management, and performance techniques such as earned value management. This guide looks at the benefits of looking at project management techniques as a cohesive whole.