I have done a project in tyre industry. There are machines like mixer, calander, ply cutter, extruder which deal with drawn rubber. The MU type keeps changing between processes, so it is difficult to track data.
I would suggest to break the process and analyse processes with same MU type together and different MUs in separate study. Start from the last process and go to the first process. This will simplify your analysis and result tracking. Hope this helps.