Calculating Ahead and Behind Amounts

When creating schedules, you can determine whether a supplier is overshipped, undershipped, or even. You calculate this amount by subtracting the cumulative shipped amount from the cumulative required amount. If the amount is positive, the supplier is behind, or undershipped. If the amount is negative, the supplier is ahead, or overshipped. If the difference amount is zero, then the supplier is on schedule.

Note: The system does not display ahead or behind values. You use the CUM Maintenance program (P40R12) to view the CUM Shipped and CUM Required values, and you perform the calculation manually.