A computerized bulk parts control system and method. The method can include providing the stream rich in an aromatic C9 from a first fractionation zone that receives an effluent from a second fractionation zone. From these data, an effective change in active device area width is related to the determined distance. The survey controller stores, by the survey controller, the calculated statistics. In a second embodiment, specifically useful for relatively flat container bodies, the flutes below the first shoulder can be missing.