The notice appears the first time you register a cost, for example a contract, on a production code. It tells you that the final forecast on the code is now driven by the actual purchase instead of the estimate, and shows what is left of the budget. You don't have to do anything: if you click Close, the remaining budget stays as a gain. If you know more costs are coming, allocate the rest to an expected addition, uncertainty or a new purchase.
What does the notice say?
The notice says that this was the first cost registered on the production code, that the final forecast has changed to the new amount, and how much of the budget is Remaining. If the code has no budget, the remaining amount is negative.
How to choose
Close: The remaining budget stays. The final forecast equals the contract, and the contribution margin increases. If the remaining budget is negative, the code shows an overrun.
+ Expected: The rest is set aside as an expected addition. Use this when you know more costs will come on the code.
+ Uncertainty: The rest is set aside as an uncertainty named «Rem. budget – [production code]».
+ Purchase: The rest is entered as a new, planned purchase. Use this when purchases remain on the code, for example electrical when you have just entered the plumber.
Good to know
You can do the same later with Add in the top right of the production code.
Agree on one method for the whole project. If you mix them, the remaining budget shows as a gain on some codes and as a cost on others.
If the remaining budget is negative, consider whether an expected addition is needed for remaining costs.