Which component is NOT part of the cumulative ATP calculations?

The component that is not part of the cumulative ATP (Available-to-Promise) calculations is future sales forecasts. Cumulative ATP calculations are primarily focused on the actual supply and demand dynamics at hand, which include current and past data points that can directly influence availability.

Current period's Master Production Schedule (MPS) amounts reflect the actual production plans, while previous unfulfilled customer orders represent outstanding commitments that need to be fulfilled. Additionally, unused MPS from earlier periods indicates production capacity that can potentially meet current demands.

Future sales forecasts, on the other hand, are speculative in nature. They estimate demand based on anticipated market conditions but do not represent actual orders that have been placed. As such, they cannot directly contribute to the calculation of cumulative ATP, which relies on confirmed demand and available supply. This distinction is crucial for businesses to ensure they can meet actual customer commitments rather than projections.