Very often I have seen there are discussions on ATP check, committed quantity, problems with ATP check in production/planned order, ATP check with replenishment lead time, sales order confirmation and delivery, material availability date etc. The answers to the most asked questions on ATP are answered through FAQ notes, knowledge base articles and consulting notes.
It is always good to read the FAQ, KBA and consulting notes when we start with a new area, these notes explains system standard behavior and possible solutions/workarounds
1725088 * Discrepancy between transactions Co09 & Co06
1893237 * Everything about transaction Co09
1719274* Checking Rule in Availability Overview (transaction Co09) will be not filled with a default value
1837190* Non-confirmation in sales documents or deliveries because of inconsistency.
1850115* Confirmed quantity couldn't be sorted as order numbers in CO09
1900457* Why ATP (like CO09) does not consider 'Final Delivery' indicator (MEPO1313-EGLK
1622500* ATP check considers Purchase orders on hold
1603840* Delivery creation with less quantity and complete delivery indicator
547118 FAQ: Result of ATP calculation
153355 No availability owing to negative ATP quantity
99999 ATP server: Installation and sizing.
835219 FAQ: ATP composite note
321803 Explanatory notes on the ATP Customizing
321803 Explanatory notes on ATP Customizing (for production orders)
548779 FAQ: Delivery units during the availability check
622299 Consulting: Availability check against planning
547508 FAQ: Schedule line overview and ATP
546965 FAQ: Correlation and delivery groups in SD
821739 FAQ : Rescheduling Transaction (V_V2) in Purchasing
498149 FAQ: Availability check in purchasing
842829 Replenishment dely from stock trans order: Special features
766475 FAQ: ATP check and confirmation of stock transport orders
123500 Controlling the results of the availability check
498149 FAQ: Availability check in purchasing
549064 FAQ: Rescheduling and backorder updating in R/3
563254 FAQ: Backorder processing
Link for displaying SAP Notes http://service.sap.com/support
If I missed any usefule notes please add it..!!
