What does the ATP two demand match function use to determine when customer demands can be promised?

The ATP (Available to Promise) two demand match function is designed to evaluate when customer demands can be promised based on existing supply capabilities and constraints. The correct answer focuses on the combination of unallocated available supply and defined order promising zones.

Unallocated available supply refers to the inventory or production capacity that has not yet been committed to existing orders or forecasts. The function examines this unallocated supply to assess whether it matches the incoming customer demand. Defined order promising zones are specific parameters or thresholds established within the system that help in determining the fulfillment capability against customer requests. By utilizing these defined zones along with the available supply, ATP can effectively predict and promise delivery dates to customers, making it a crucial part of supply chain management.

The other choices do not align directly with how the ATP two demand match function specifically operates. Historical data, sales forecasts, customer feedback, inventory levels, and production schedules are valuable in context but do not serve as the primary mechanism for determining the ability to promise specific demands to customers. Instead, they may inform broader planning and forecasting processes rather than the immediate allocation and promise scenarios addressed by the ATP function.