I have two condition(Issue history and issue type BUG) to filter out the bug and calculate the sum. But I do not know to write the measure. Is it correct?
([Measures].[Issues history] AND [Issue Type].[Bug],
[Transition Status].[Open],
[Priority].[Blocker])
You are almost there! When you are using tuple construction in the calculation formula, each dimension member should be only comma-seperated. Remove AND and you are ready to go: