This paper explores the crucial role of Human Resource Management (HRM) in achieving organizational success, using Marks and Spencer (M&S) as a case study. It examines the purpose and function of HRM in workforce planning and resourcing, analyzes the strengths and weaknesses of different recruitment and selection approaches, and evaluates the effectiveness of various HRM practices in boosting organizational profits and productivity. The paper also delves into the importance of employee relations in influencing HRM decision-making and identifies key elements of employment legislation and their impact on HRM practices within M&S. Finally, it illustrates the application of HRM practices in a work-related context, using specific examples from the company.