This report covers the importance of critical thinking in the workplace and its impact on productivity and profitability. It explains the difference between beliefs, attitudes, and values and their interlinkage with management theories. It also discusses the role of an assistant manager in Tesco and relevant management theories such as Bureaucratic Theory, Scientific Management Theory, Human Relations Theory, and Tuckman Teamwork Theory. The report concludes with a critical assessment of beliefs, attitudes, and values on particular management theory in regards to assistant manager.