Museums Measuring Success

Increasingly, museum professionals are challenging the old standard ways of measuring 'success'.  It is hard to break the old habits of relying on attendance, revenues and gifts - but these have their limitations, as everyone knows.  What are the most creative ways measuring 'success' in museums that you've encountered?  They could be measurements in the experiences of individuals or groups, either inside the museum, offsite or online? Many of these are likely to be qualitative measures to demonstrate the real impacts of museum activities on people. In time, and with dialogue across the profession, these can be turned into quantitative measures that can help direct the work and priorities of museums.  They can help museums to find new ways of being meaningful in our culture(s).  It would be great to hear what members of this group are thinking about.