This report examines the Engel Kollat Blackwell model, situational influences, psychological influences, and social influences on consumer behaviour, specifically focusing on Rolex Watch Company. It discusses the various stages of the decision-making process, the factors influencing the decision process, situational influences on buyer behavior, and the psychological theories that explain human thoughts, emotions, and behavior. Additionally, it explores the role of social influences in shaping consumer behavior. The report concludes with recommendations for marketers to improve consumer behavior and achieve marketing objectives.