Supply chain management involves all processes involved in converting raw materials into finished goods that are delivered to customers, including manufacturing, distribution, and transportation. It aims to make movements of goods simple, cost-effective and efficient. Materials management is a core supply chain function that regulates the flow of materials based on changes in demand, prices, availability, quality, delivery and schedules. Just-in-time inventory systems aim to minimize inventory levels by aligning raw material orders directly with production schedules to reduce storage costs. Forecasting provides information about past, present and likely future events to help managers make planning decisions with confidence.