To give estimation for when work will be done

Salam, I am a developer, we use Agile approach at work, one of the rules is to be able to give estimations for when a task will be done. Managers are claiming that it is just an "estimation" but in the same time they ask super precise estimation. The concept of **Incha'Allah** seams to not be used, And I am wondering if it is still fine to work on this kind of tasks, is it "Allowed" ? Salam