Organizations operate in environments shaped by volatility, interconnected systems, and rapid technological change. Traditional resilience models cannot keep pace with this level of disruption. Relevant Impact: A Field Guide to Integrated Assurance presents a practical path forward. It shows leaders how to strengthen resilience by building capability that functions in real conditions rather than relying on documents and audit scores that often fail under stress. The field guide expands the Integrated Assurance model introduced in Integrated Assurance: Unified Risk Strategy and demonstrates how it works inside real organizations. It explains how governance, operations, security, compliance, and business functions align to create a unified capability that moves with clarity and confidence during uncertainty. The book provides a detailed view of the Integrated Assurance Maturity Model (IAMM) and teaches leaders how to measure trust velocity, control integrity, and recovery performance in ways that influence executive decisions. This is not a theoretical framework. It is a practical guide that shows organizations how to embed assurance into daily work. It explains how to sense risk as it emerges, strengthen cross-functional coordination, and build teams that act with discipline during high-pressure events. Real examples illustrate how enterprises respond to incidents, manage transformation, and sustain performance while conditions shift around them. Relevant Impact equips leaders with the structure, language, and metrics needed to convert resilience into a strategic advantage. It offers a clear path for organizations that want to operate with maturity and protect growth in a world defined by constant disruption.