This is where you enter the lot size for which the pre-calculations should be calculated for those parts that are missing EOQ (economic order quantity). Under the Create tab, before the calculation begins, these parts are shown by having their EOQ quantity in red. When the calculations are saved, this lot size will be configured for the EOQ for these parts.
If you use alternate preparation and have set a Quantity condition for the part in the preparation that is included in the pre-calculation, it will be taken into account here. Read more about how terms and conditions affect this procedure under Alternate Preparations and Pre-Calculation Selection.