Fixed Duration Attribute

The Fixed Duration Attribute determines how fixed durations are assigned and stored. By default, Fixed Durations are stored in the Gantt Chart and can be manually set or updated using the Task Details panel or dragging its edge on the chart (when a fixed duration is set).

Fixed Duration in Gantt Configuration

By changing the Duration Attribute, you can automatically assign fixed durations to tasks, based on a Jira attribute.

Format

If you use a custom field for the Duration Attribute, you can also specify the format of values in that field. 

Fixed duration format

This tells Structure.Gantt how it should interpret the values in the field (milliseconds, minutes, hours, etc.). You can also select Text duration to use Jira duration format (1d 3h 30m).