This report provides a comprehensive analysis of strategic human resources management (HRM) and workforce planning within the context of organizational success, using Marks and Spencer as a case study. Part 1 delves into strategic decision-making in HR, examining the aim, scope, and purpose of strategic workforce planning, key internal and external influences on the HR function, and strategic and operational considerations. It also links contemporary theory to practice, demonstrating how it supports HR strategy and business objectives. Part 2, presented in PowerPoint slides, critically evaluates change management models, assesses HR's role in sustainable business performance, and proposes techniques for monitoring the impact of the workforce plan. The report concludes with recommendations and references, highlighting the importance of HRM in achieving sustainable growth and performance.