This report provides a comprehensive analysis of financial decision-making, focusing on management accounting techniques and their application within SKANSKA PLC. The report begins with an introduction to the company and the significance of accounting and finance functions. It then delves into various management accounting techniques such as financial planning, financial statement analysis, cash flow analysis, standard costing, decision-making, marginal costing, and budgetary control. A critical analysis of these techniques is presented, evaluating their role in planning, decision-making, and controlling within the context of SKANSKA PLC. The second part of the report focuses on ratio analysis, including the calculation and interpretation of key financial ratios such as ROCE, net profit margin, current ratio, debtor collection period, and creditor collection period for SKANSKA PLC. The report concludes with an overall assessment of the effectiveness of management accounting techniques and ratio analysis in aiding financial decision-making within the company, offering insights into the strengths and potential limitations of these approaches.