For a calculated measure, the formula could look similar to the one below:
[Measures].[Issues last updated]
It will return the number of issues updated in a seven day period (today - six days ago). See the eazyBI documentation page on calculations with Time dimension - https://docs.eazybi.com/eazybi/analyze-and-visualize/calculated-measures-and-members/calculated-members-in-time-dimension.
Roberts // firstname.lastname@example.org