There are times when business would like to,

• Over-rule certain ATP confirmations
• Look into possibilities to restrict fulfilment to order due to certain business validations 
• Plans to dispatch round-down values rather than odd numbers

During such business needs, there were no possibilities in the past to over-rule the confirmations but now with release of CAR BAdI, ATP users get a opportunity to over-rule a confirmation and also persist the values for further logistical processings. 

Source link