The Work Logged column displays the sum of time spent on an issue over a specific period of time and, optionally, by a specific user.
Work Logged column allows you to select one of the predefined periods using the column configuration panel. It is also possible to choose arbitrary period using "Custom period" option and calendar to pick dates.
Displaying Aggregate Values
Work Logged column also offers to display an aggregated value, calculated as the sum of time spent over sub-issues.
To display an aggregated value, use the column configuration panel and select Sum over sub-issues.
How is Work Logged Calculated?
Each time you log work on some issue you have to define "Time Spent" and "Date Started" values. The Work Logged column will summarize logged time spent over a selected period.
Note that the start of the selected period is calculated based on the column creator's time zone. This time zone can be configured on the user's profile page.
You can also create your own instance of Work Logged column to calculate the sum of time spent over a selected period in your current time zone if work logs are being created in different time zones.