ATP (Available to Promise)

1.During ATP, the system checks that all issues are covered by existing receipts
2.Hence, if any quantities are left to cater new issues. This is ATPQuantity

ATP (Available to Promise)
It can be done at various stages, in the business:
At Sales and distributionWhen creating the Sales order, availability check is carried to know whether the delivery can be done at the required date.

Planned order processingWhen converting a planned order into a production order, to know the material availability to fulfill the production order.
Production order processingWhen processing production orders, to know the material availability.

Inventory ManagementWhen changing reservations, or doing goods issue, an availability check can be done to know whether it can fulfill the requirement and also whether it affects the availability of other elements

ATP calculation is as follows:The receipts (warehouse stock, planned orders, purchase requisitions) are dynamically allocated to the issues (customer requirements, PIR’s, reservations), which lie directly after them on the time axis. The calculation is carried out in such a way that the issue is allocated to the receipt that lies nearest to it and that still has a positive ATP quantity.If the ATP quantity of this receipt does not cover the issue then the system will search for and check the next nearest receipt (always in a backwards direction) for a positive ATP quantity, which will then also be allocated to the issue.If receipts do not cover the issue, you must then decide whether you reduce the requirements quantity as necessary or whether you move the requirements date so that requirements coverage can be reached again.


Availability Check at Plant Level
Availability Check at Storage Location Level
Availability Check at Batch Level
If only one batch is entered, the check is carried out on two levels, first against the batch and then against the plant stock.
If a batch and a storage location are entered, the check is carried out on four levels, first against the batch storage loc ation, then against the batch, the storage location and the plant stock.
Availability Check for Individual Customer Stocks and Project Stocks
Individual customer stocks and project stocks are maintained separately in the system and are not contained in plant stock. If an issue is made from individual customer stock or project stock, the availability is checked only for this particular customer stock.