Transaction Group 

All business transactions are assigned to a transaction group in availability control.

You can store an action for the system to execute for a business transaction that triggers too many allotted funds.

For more information, see Availability Control Actions.

For the following transaction groups, you can specify tolerance limits for each budget profile, for the different actions. To do so, go to Customizing and choose:

This general transaction group is designed to facilitate your entries, and is useful if you do not want to define separate tolerance limits for each transaction group. In addition to a tolerance limit defined for All transaction groups, you can specify a limit for one transaction group. This limit takes precedence over the "generally" valid tolerance limit. The tolerance limit and action specified for all transaction groups is thus ignored if there are additional entries for a special transaction group.

Postings to orders for the project are checked in each transaction group, for example, the purchase order from an order for the project is checked in the Purchase order transaction group.