Using rescheduling messages

The order must be delivered earlier because there is a discrepancy between the delivery date on the order and the required delivery date. This discrepancy can be caused by:

• The start date of the element (or, if not available, the project) is brought forward.
• The start date of the activity budget line is brought forward (either manually or as a result of changes in the external scheduling package).
• The delivery date of the order is deliberately postponed.

The order can be delivered later because there is a discrepancy between the delivery date on the order and the required delivery date. This discrepancy can be caused by:

• The start date of the element (or if not available, the project) is postponed.
• The start date of the activity budget line is postponed (either manually or as a result of changes in the external scheduling package).
• The delivery date of the order is deliberately brought forward.

The order must be cancelled because the quantity of the order exceeds the available quantity. This discrepancy can be caused by:

• Reductions in the activity or element budget
• Cancelation of a budget line
• Over-ordering