How to get the field Revenue Estimate updated in KK (commitment Control)?

Hello All,

in KK there are 3 types of information regarding the revenue:

1)Recognized Revenue
2)Collected Revenue
3)Revenue Estimate

-To update the Recognized Revenue in KK you need to create a pending item and run the AR Update.
-To update the Collected Revenue in KK you need to create a regular/express deposit, apply to an item and run AR Update.

and my question is: how can we get the Revenue Estimate update? what is the purpose of that field?

Thanks,