Supply chain management aims to improve operations, manage increasing costs and pressures, and leverage globalization through better coordination across the chain. It involves functions like logistics, purchasing, inventory, and customer relationship management. Key benefits include lower inventories and costs, higher productivity, and greater agility. However, integration challenges and variability pose risks to effectiveness. Metrics like delivery time, flexibility, and information velocity are used to measure performance. Collaborative planning helps improve forecasting accuracy through information sharing.