Also to add, in ATP Check, maintain the settings as below:
Let’s have a look at the settings for this combination of 01 + A
The check without RLT is not ticked.
“Check availability without replenishment lead time
Indicates whether, during the availability check, the system checks the replenishment lead time.
Items for which the delivery date falls within the replenishment lead time, but for which there is no inventory, are confirmed for delivery after the replenishment lead time. In the case of items for which the delivery date falls after the end of the replenishment lead time, the system assumes that everything can be confirmed.
If you want the system to check the replenishment lead time, you should make sure that you have entered a value in at least one of the following three fields in the material master:
GR (goods receipt) processing time (Purchasing view)
Planned delivery time (MRP I view)
GR processing time (MRP II view)
Otherwise, the system confirms every requirement.”
So if you maintain all these fields as zero, so no ATP will be carried out and it will confirm all the orders on creation date itself.
Regards,
Aayush Jain