ASCP Shortage and Overage tolerances

We have two needs:

1) When we produce slightly more than the customer's order quantity, we will ship all of it to the order and not hold on to the extra.  This is because many of our customers want a single lot, and predicting the yield perfectly is impossible.

2) When we produce slightly less than the customer's order quantity, we ship the order and close it as if it were complete.  We do not take material from another order or start a remake lot to fill the shortage.  Again this is because our customers generally want the product of a single lot.