Egon, I don't think the bubles to which the gentleman refered were in beer.
Instead they are part of a successive decomposition methodology of analysis where there are hierarchical layers of refinement where bubbles represent things or processes and can be successively decomposed into ther constituent parts which in turn can be decomposed into their... until the bubbles are so fine I once termed them FROTH (as a term of derision for when successive decompositon was OVERDONE and the term stuck in certain Government circles (certain specialized analytical groups in the DoD.)
I may have preferred beer.
[img]/forums/images/icons/smile.gif[/img] Pat [img]/forums/images/icons/smile.gif[/img]