Suppliers Demand for Instructions (SDI) is a set of instructions that suppliers must follow when providing goods or services to a company or organization. SDI is used to ensure that suppliers meet the quality and quantity requirements of the customer. It covers all aspects of the supplier’s operations, from sourcing and selecting raw materials to production, delivery, and customer service. SDI is also used to ensure that suppliers comply with the customer’s environmental and safety standards, and that they adhere to the terms of the contract. There are two main types of SDI: 1. Proactive SDI: This type of instruction is used when a company has specific requirements for its suppliers. For example, a company may require that all suppliers use only certain materials or processes, or that they meet certain environmental standards. 2. Reactive SDI: This type of instruction is used when a supplier fails to meet the customer’s requirements. For example, if a supplier fails to meet the agreed delivery time, the company may require that the supplier take specific steps to rectify the issue. SDI is an important part of the supply chain management process and is essential for ensuring that suppliers meet the customer’s requirements.