In order to reply to client order questions, a business function called available-to-promise (ATP) is employed. It generates the available quantities of a desired product and the delivery deadlines based on the availability of resources. When it comes to production, ATP is determined by subtracting demand (customer orders) from supply (incoming inventory) + onhand (current inventory). The following definitions apply to Business Continuity Management (BCM) and Business Continuity Planning (BCP): - Supply is the complete amount of resources that are available to carry out a task. - Demand is the entire demand that has been prioritized in accordance with the Business Impact Analysis (BIA). - There is no work backlog and no pre-existing inventory when the onhand value is set to 0