When the format of a formula column is set to Work Time, Structure uses Jira's time tracking settings to convert the number of hours to the number of days and weeks. By default, Jira is configured for an 8 hour work day, with 5 work days per week.
If Duration is selected, but Work Time is not checked, hours are converted to days and weeks on a calendar basis. |
Whether you need to use the Work Time option depends on where the value is coming from:
now() - created), leaving the Work Time option will give you a more accurate result.time_spent + remaining_estimate - original_estimate), selecting the Work Time option will give a result based on actual work hours.