Field help (EARQTY) 

The early/late for the delivery requests is only calculated from the firm delivery requests and is expressed by two items information. The following fields are grayed out (for the inter-site delivery requests, there is no early/late management).
This early/late quantity is expressed in the sales unit entered in the contract order line.
It is incremented in the following cases:

This quantity is decremented in the following cases:

The calculated information is used to verify the consistency of the information supplied by the customer and the current status of the request management linked to the contract order.