ocr: 80:20 Rule Ettective stock control can be tacilitated by recognition of"the 50-20 rule." - This rule highlights the fact thatin most businesses the vast majority of stock value is tied upin relatively few different types ofs stock item. The rule says that 80% of the stock items have only 20%oft the value and as a resulti it makes sense to concentrate stock control efforts on those other high value stockitems.