Today’s organizations face rapid change, digital disruption, and rising demands for sustainability and resilience. This fifth edition text equips executives, students, and educators with a proven framework for designing effective organizations in complex environments. Built on decades of research, the multi-contingency model provides a step-by-step guide from diagnosis to design and implementation-now expanded to include knowledge interdependence, AI integration, sustainable development, and organizational resilience. Rich with real-world cases from LEGO, Microsoft, Haier, and Blackberry, the book blends theory with practice and offers clear visuals, intuitive 2×2 models, and tools to support hands-on learning and application. It helps readers understand who should do what, talk to whom, and-crucially-know what, in today’s increasingly dynamic settings. Whether used in executive education or as a core text in MBA and business school courses, this updated edition is a comprehensive, accessible, and globally trusted guide to modern organizational design.