Most organisations struggle with unclear roles and responsibilities, leading to inefficiencies, slow decision-making and constant reorganisations. This comprehensive guide explores how properly defining your division of labour—from corporate governance down to individual contributors—can dramatically improve productivity and reduce friction. Drawing on 200 years of industrial practice, the article presents a practical six-step blueprint for implementing clear roles, responsibilities and competency profiles across your organisation within 12 months. Key elements include establishing governance documents, maintaining updated RACI charts, linking job profiles to competencies, and ensuring proper integration during acquisitions. Companies that master division of labour, such as Apple, Walmart and Procter & Gamble, avoid costly reorganisations and focus resources on customers and markets instead. The framework requires CEO and CHRO sponsorship but delivers substantial returns through reduced attrition, faster decision-making and improved organisational agility in today's rapidly changing business environment.