Custom field with date can be imported as measure, then a new measure 'Issues with ..custom date..' will be created for you. See more details here https://docs.eazybi.com/display/EAZYBIJIRA/Custom+Fields#CustomFields-Measureswithcustomdatefields.
You can use this measure in cumulative calculation with PreviousPeriods function as follows
Cache( NonZero(Sum(PreviousPeriods([Time].CurrentHierarchyMember), [Measures].[Issues with SLA time] )) )
When Time dimension is on rows, this Measure will show how many issues had the SLA time before the end of each period that is selected on rows.
Let me know if there is anything else I can assist you with!
Lauma / firstname.lastname@example.org
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