This report discusses the importance of management accounting in decision making and its role in achieving sustainable success for organizations. It explores various management accounting techniques and planning tools, such as cost accounting, budgeting, and investment appraisal. The report also compares and contrasts three different planning tools that ensure financial stability and performance. Additionally, it examines the advantages and disadvantages of different types of planning tools and how management accounting can be used to respond to financial issues. The application of management accounting planning tools to maintain sustainable success is also discussed.