This report provides a comprehensive analysis of Danone's operations, focusing on product costing systems, corporate social responsibility (CSR), and sustainability reporting. It begins by examining Danone's business processes, including upstream, manufacturing, and downstream activities, highlighting the company's commitment to health and well-being through its food products. The report then delves into the design of an activity-based costing (ABC) system, comparing it with traditional costing methods and illustrating its advantages for accurate service costing and decision-making. Finally, it addresses Danone's social and environmental concerns, evaluating its performance based on social indicators like employee satisfaction and industrial accident frequency, and discussing initiatives for waste reduction, resource management, and pollution prevention. The analysis incorporates cost management principles and decision models to support tactical decision-making and foster environmentally sustainable operations, offering valuable insights into Danone's strategic approach to cost management and corporate responsibility.