# Configuration Management

## How to Calculate the Effectivities

| ### What to do:
| Select Start > Items. The Items mask is opened.
| Search for item ART-1000.
| Select the Effectivities tab.
| Click the Refresh button ().
| All Model-Unit-Effectivities of item ART-1000 are calculated and displayed as follows:
| Please note that the effectivity can only be calculated and displayed for configuration items (items under control of the Configuration Management)!
| The effectivity for ART-1200 or ART-1500 is displayed as follows: