Please see attached qv file and dataset attached. What I'd like to try and do is that regardless of what level you are selected at within anyone of the three drill downs, when ever you switch over between any of the three charts it should always start at level 1 for that particular drill down.
so for instance if I've drilled down to level e3 on that chart then I choose to move over to the s drill down chart it should start at S1.
As far as I know that's not possible. The drill down group will move down to the level where multiple possible values exist. If you select Software in E1 then there's only one possible value in SST L1 and SST L3. That's why the S group will move directly to SST L2. The group definitions don't work well with set analysis or alternate states so I don't see a way to use those to 'fix' your problem.