I want to create a field in name of variance for the issues

[Saurabh Pathak]

I want to calculate the variance for the given start date and due date. So how can I add a new field that is related to the variance=actual date-due date.
So can You suggest me, how can I use the field to show it.

[Mayura Gautham]

Hey @Saurabh Pathak 

To calculate the difference between actual and due dates, use the diff smart value within automation rules, specifying the desired unit (e.g., days, weeks, months). For example, {{issue.actualDate.diff(issue.Duedate).days}} will return the difference in days. 

Please refer to Date difference {{[date1].diff([date2]).[unit]}} 

Hope this helps :)