The system sets the availability date for period lot-sizing procedures to the first requirements date of the period. However, you can also define that the availability date is at the beginning or end of the period.

The availability date is the date by which the material must be available for production and includes the goods receipt processing time.

You define the availability date for period lot-sizing with the Scheduling indicator in Customizing.

In the standard system, the availability date for period lot-sizing procedures is set to the first requirements date of the period. From this date, the system subtracts the goods receipt processing time to calculate the delivery date or order finish date for the procurement proposal. The requirements that lie between the period start and end are grouped together into a lot.

If the setting has been made in Customizing for the availability date to be at the beginning or end of the period, the basic dates of the planned order are rescheduled as well as the dependent requirements for the components.