This book presents a practical, system-level framework for justifying safety—transforming standards-mandated analyses, requirements, architectural decisions, and verification activities into a coherent, defensible safety argument. Rather than introducing new regulatory obligations, it shows how to organize existing safety work into explicit claims, supporting arguments, and credible evidence that can be reviewed, challenged, and defended. Written for engineers, safety practitioners, reviewers, and decision-makers, the book guides readers through the full safety lifecycle, including intended use and operational scope, hazard identification and risk framing, safety goals, requirements derivation, architecture, verification and validation, human interaction, lifecycle change, and regulatory defense. Throughout, it emphasizes system-level reasoning, traceability, and evidence quality—ensuring that safety intent is preserved from concept through operation. The book is not a checklist, a template collection, nor a reinterpretation of standards. It is a structured approach to engineering and justifying safety in modern mining and construction machinery—one that strengthens compliance, improves reviewability, and enables organizations to innovate responsibly without compromising defensibility. For those responsible for explaining, approving, or defending machinery safety, this book provides the missing structure that turns safety activities into safety justification.

Mohammed Abdulla Al Yousuf is a System Safety Engineer based in San Jose, California, specializing in safety engineering for complex autonomous and industrial systems.