WineGlass model anyone?

#1
Hi..i have been asked to prepare a wineglass control chart which is used by retail chains for supply chain management. I googled, but there is hardly any information out there. Please help.
 
#3
thanks much! this is the only information i was also able to google. Did not really understand much...infact, if you have used this model or seen it being used for any other business case (not necessarily SCM), then that would be helpful too.