You can have the Early Warning System monitor the extent to which your purchasing budget has actually been used up and alert you to any exceptional situation. The Early Warning System is part of the Logistics Information System.

To define the exceptional situation, you create an exception to show you when your OTB has fallen below or exceeded a certain percentage of what was planned. You define the exception as a threshold value and enter the plan realization as a percentage together with an operator (<, >, =). Via a color coding scheme, the system warns you when the specified threshold has been reached.