SAP APO GATP Basic Methods of Availability Checks
Basic Methods of Availability Check
•Product Availability Check:
•Also known as Availability Check based on Available to Promise (ATP) quantities
•The ATP quantity is calculated from warehouse stock, planned receipts (production orders, purchase orders, planned orders, and so on), and planned issues (sales orders, deliveries, reservations, and so on).
•For this type of availability check, the system dynamically checks stock and planned goods movements for each transaction – either with or without using the replenishment lead time.
•Planned independent requirements are not taken into account.
•Availability check against product allocations
•Materials can be allocated using any criteria.
•The availability check is successful if there is a product allocation for this transaction in the relevant period and this product allocation has not yet been consumed by other requirements.
•The check against product allocations is used in situations where supply is smaller than a demand
•This prevents one customer (or a few customers) from buying the complete quantity and other requirements not being satisfied.
•Availability check against the forecast
•In the check against the forecast, the system checks against a planned independent requirement created for an anonymous market.
•This is usually not customer-specific.
•For example, in the strategy planning without final assembly, if production is only carried out to the stocking level.
•The planned independent requirement results from demand management and is used for non-order specific planning of expected future sales quantities.
Advanced Availability Check Methods
The combination of basic methods
For example, first, execute a check against product allocations.
Then check the resulting confirmed quantities against the relevant ATP quantity
within the product availability check.
•Rules-based availability check
•You use the rules-based availability check to automatically or manually optimize the process for
deciding between alternatives using predefined rules.
•If a product is not available, for example, you can check substitutes for availability or you can check
the availability of the original product in other locations.
•Another option would be to select alternative PPMs within the framework of production.
•These alternatives are stored in master data (rules) and determined specifically for a transaction