👉 In inventory management, a preinventory is a period of time before actual inventory levels are established. This can occur during the planning stage for a new product launch, when it's still being tested or developed to gather data about customer needs and preferences. During this phase, suppliers will be given more time to prepare their inventories, ensuring that they have enough stock to meet demand. Once the preinventory period is over, actual inventory levels are established during the actual production stage of a product launch.