**As** an OpenProject user
**I want** remaining hours to be calculated based on the difference of estimated time and logged time (on the work package)
**so that** I have an automatic way to calculate the remaining time.

**Acceptance criteria**

* When _estimated time_ is set for a work package, remaining hours should be set accordingly.
* When time is logged on the work package, the remaining hours should be reduced accordingly (remaining hours = estimated time - logged time).
* When the estimated time is edited, the remaining hours should be adjusted accordingly.
* Remaining hours must not be connected to the Backlogs module. It is a native core feature.
* Remaining hours should be renamed to "Remaining work"
* Begin of the insertionWhen a user logs time on a work package the user can decided to reduce the remaining time accordingly.
* End of the insertion The Remaining work of children needs to be treated like &quot;Estimated time&quot; <mention class="mention" data-id="40867" data-type="work_package" Begin of the insertiondata-text="#40867">#40867</mention>End of the insertion Begin of the deletion data-text="#40867">#40867</mention> End of the deletion
* All values need to be shown in one modal view (similar to the duration in the date picker)
* Estimated time (Work)
* Logged time (Actual work)
* Progress % (% Work complete)
* Remaining hours (Remaining work) Begin of the insertion
End of the insertion Begin of the deletion

**Open questions**

End of the deletion * Begin of the insertionLogged time canEnd of the insertion Begin of the deletion Should thisEnd of the deletion be Begin of the insertionhigher than estimated time. Example
End of the insertion Begin of the deletion a global admin setting (to be activated / deactivated)?
End of the deletion * Begin of the insertionLogged time: 50 h
End of the insertion Begin of the deletion It could make sense to add a second field for this purpose instead, as there are several use cases where you want to set the remaining time/effort that needs to be put in manually (current intention/behavior). This would make it more clear for the user, too.
End of the deletion * Begin of the insertionWork: 40 h
* Remaining work: 0 hEnd of the insertion Begin of the deletion What happens when logged time &gt; estimated time? Negative remaining hours?End of the deletion