The vendor therefore delivers every two weeks on Tuesdays. The planned delivery time means that you must inform the vendor of the required quantity at least 3 days before the delivery date.

For the standard setting (availability date = start of period), the system groups all requirements in period 1 together and creates a procurement proposal for 170 pieces for the start of the period 1, that is for the 1 March.

The availability date of this procurement proposal is 1 March. Starting from here, the system schedules backwards, that is, the goods receipt processing time is subtracted, resulting in the delivery date 28 February. Then the system subtracts the planned delivery time of three days which results in the release date 24 February.

The requirements are grouped together between the period basic dates. This results in a lot of 170 pieces for the 1 March and another lot for 240 pieces for the 12 March.

With the setting Interpretation of the Planning Calendar Periods as Delivery Dates, the delivery date of the first period is 1 March and the delivery date of the second period is 15 March. This means that, including the goods receipt processing time, the requirement on the 15 March can no longer be completely covered, as the availability date of the procurement proposal in the second period is 17 February. Therefore, the requirement of the 15 March must be added to the period lot with the delivery date 1 March.

Thus, for the first period, three requirements are grouped together: the requirement of 3 March, of 8 March and of 15 March for 320 pieces. The procurement proposal for 15 March is created for 90 pieces.