The uncommitted portion of inventory and planned production that is available to fulfill customer orders is referred to as available-to-promise. It is an essential metric in order fulfillment and supply chain management that enables businesses to give clients precise delivery dates. Scheduled receipts, planned production, and current inventory are all taken into account in ATP calculations in relation to verified customer orders. Businesses can maximize customer satisfaction while avoiding overpromising and underdelivering by keeping real-time ATP visibility.