Typically estimation does not match reality. Someone can estimate a task to take 5hours and is done within 15minutes. Other times after 10hours it still isn't half way complete.

If this were a feature, I would expect to have it turned off on my Redmine instances.

Kind regards

Adam Żochowski
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We have the same request in #11999. See our description for the reason why this makes sense anyway. I totally understand Adams' argument. Although in some projects it totally makes sense to have the total issue done ration being calculated based on the spent time value. If *Spent Time* is greater than *Estimated Time* and the option to calculate the done ratio based upon these 2 values is turned on, the done ratio for a task should simply be set to 100%.

Perhaps, when using the option to calculate the done ratio based upon Estimated Time/Spent Time is enabled, the field *Estimated Time* should be renamed to *Time Required* or *Lead Time*. Then it again makes sense.

This is useful for projects where the customer pays for a certain amount of hours (in advance) and has the ability to check the status on the issue he payed for. Thus if *Spent Time* exceeeds *Estimated Time* the bar in the issue overview should become red or something to visualize that an issue is over the "limit".
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+1
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+1

We can add another field with the estimated remaining time and use it to calculate a more realistic done ratio. Something like this:

1) Starting:
Estimated Time: 8 h
Spent Time: 0 h
Remaining Time: 8 h
% done: 0 %

2) Halfway:
Estimated Time: 8 h
Spent Time: 4 h
Remaining Time: 4 h
% done: 50 %

3) Some delay:
Estimated Time: 8 h
Spent Time: 8 h
Remaining Time: 4 h
% done: 50 %
And since Spent Time + Remaining Time > Estimated Time, we have a delay, and then we should get the red bar to signal it. :D

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+1 for a new optional fieled with configurable algorithms from selection below
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+1
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+1
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relates,New,12347,"Calculate the issue done ratio" per project configuration
relates,New,11999,Calculating issue done ratio based on "Estimated Time" and "Spent Time" - selectable by project (not globally)