**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 Begin of the insertion_Work_End of the insertion Begin of the deletion _estimated time_End of the deletion is set for a work package, Begin of the insertion_Remaining work_End of the insertion Begin of the deletion remaining hoursEnd of the deletion should be set accordingly.
* When time is logged on the work package, the Begin of the insertion_Remaining work_End of the insertion Begin of the deletion remaining hoursEnd of the deletion should be reduced accordingly Begin of the insertion(_Remaining work_ \= _Work_End of the insertion Begin of the deletion (remaining hours = estimated timeEnd of the deletion - Begin of the insertion_Logged time_).End of the insertion Begin of the deletion logged time).End of the deletion
* When Begin of the insertion_Work_End of the insertion Begin of the deletion the estimated timeEnd of the deletion is edited, the Begin of the insertion_Remaining work_End of the insertion Begin of the deletion remaining hoursEnd of the deletion should be adjusted accordingly.
* Begin of the deletion Remaining hours must not be connected to the Backlogs module. It is a native core feature.
* Remaining hours should be renamed to "Remaining work"
* End of the deletion When a user logs time on a work package the user can decide to reduce the Begin of the insertion_Remaining work_End of the insertion Begin of the deletion remaining timeEnd of the deletion accordingly.
* Begin of the deletion The Remaining work of children needs to be treated like &quot;Estimated time&quot; <mention class="mention" data-id="40867" data-type="work_package" 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)
* Begin of the insertionWorkEnd of the insertion Begin of the deletion Estimated time (Work)End of the deletion
* Begin of the insertionSpentEnd of the insertion Begin of the deletion LoggedEnd of the deletion time Begin of the deletion (Actual work)End of the deletion
* Begin of the deletion ProgressEnd of the deletion % Begin of the insertionCompleteEnd of the insertion Begin of the deletion (% Work complete)End of the deletion
* Remaining Begin of the insertionworkEnd of the insertion Begin of the deletion hours (Remaining work)End of the deletion
* Begin of the insertionSpentEnd of the insertion Begin of the deletion LoggedEnd of the deletion time can be higher than estimated time. Example
* Logged time: 50 h
* Work: 40 h
* Remaining work: 0 h Begin of the insertion
* Remaining work can not be higher than WorkEnd of the insertion