Management accounting provides financial information for internal use in planning, decision-making, and control. It helps managers identify inefficient areas, forecast future performance, and determine costs. In contrast to financial accounting which has fixed rules, management accounting tools may differ between organizations. While it provides information, management accounting does not make decisions - that responsibility remains with management. Some key functions include margin analysis, breakeven analysis, constraint analysis, and target costing. Limitations include reliance on financial/cost accounting data and lack of knowledge in related fields. Management accounting is an evolving system that aids strategic decision-making through tools like ratio analysis, budgets, forecasts, and variance analysis.