Understanding how line logic affects line efficiency is relevant. For example, in terms of line efficiency the filler represents the core machine as “Lead” speed reference of all equipment, so everything else is a constraint. If all the equipment would run at the same speed as the filler any stoppage on the line before the filler would mean a permanent gap in the line because the line would never catch up. Also, any stoppage on the line after the filler would mean a bottle jam because the line becomes full. Therefore, to ensure continuous flow the filler must be the slowest machine on the line and all other production steps on line have to run faster than the filler (Figure 3.).