Supply Planning and Demand Planning are two vital processes in the world of business. Supply Planning is the process of determining the optimal amount of resources and materials that need to be sourced and stored to meet consumer demand. It also includes forecasting, inventory management, and scheduling production. On the other hand, Demand Planning is the process of forecasting customer demand for a product or service by utilizing historical data, market trends, and other external factors. The primary focus of Demand Planning is to understand likely customer behaviors in order to ensure accurate supply planning processes. Both processes must work together in order to avoid supply shortages or excess unsold stock. By utilizing both Supply Planning and Demand Planning, companies can better manage their resources and maximize efficiency while providing customers with better products and services.