This report presents a comprehensive weight management analysis of a 51-year-old truck driver named Dave, who is obese due to a sedentary lifestyle, poor dietary habits, and smoking. The report begins by identifying the likely causes of Dave's obesity, including his reliance on ready-to-eat meals, lack of physical activity, and the stress associated with his job. It then calculates Dave's daily energy requirements using the Harris-Benedict, Schofield, Henry, FAO, and WHO equations, critically comparing the results and highlighting the most appropriate method. The core of the report outlines and evaluates a weight management program tailored to Dave's specific needs, including lifestyle modifications, exercise recommendations, and dietary guidelines emphasizing plant-based meals and portion control. The report also identifies potential barriers Dave might face during the intervention, such as lack of time, knowledge, and social support. Finally, it discusses strategies to minimize deterioration, including patient education, communication skill development, and the use of technology to support the weight management process. The report emphasizes the role of a registered nutritionist in providing guidance and support to help Dave achieve his weight loss goals and improve his overall health.