What inspired this wish list request: JMP seems to have a measure for k-means to choose an optimal number of clusters.
What is the improvement you would like to see:
I believe hierarchical clustering has some statistical measures such as silhouette to statistical choose an optimal number of clusters.
If this does not currently exist within JMP, perhaps you will consider adding it.
Why is this idea important? A statistical measure would be more accurate than the current graphical technique