This report presents a comprehensive case study analysis of Bell Studio's information systems, focusing on the purchase, cash disbursement, and payroll systems. It details the data flow diagrams and system flowcharts for each system, illustrating the processes and entities involved. The analysis identifies internal control weaknesses, such as lengthy inspection processes, manual record-keeping, and the distribution of reports to various departments within the purchase system. Risks associated with these weaknesses are discussed, including increased response times, space constraints, and extended product development times. Similarly, the report highlights weaknesses and risks within the payroll system, such as accounting system access controls, separation of duties issues, and data redundancies. The cash disbursement system's internal control weaknesses, including improper controls and continual adaptation issues, are also examined, along with their associated risks like unorganized and irregular procedures. The report concludes by summarizing the key findings and implications of the analysis for Bell Studio's information systems and offers recommendations for improvement.