The benefits of implementing an automated mixer control system to replace a manually controlled mixing process are well-known. Less variability in the mixing process yields more consistent mixed compound and improves overall operating efficiencies, provided the new automated mix cycles are designed properly. A side effect of an automated control system is that inefficiencies in systems that feed bulk components into the mixer are magnified. This case study explores how the installation of an automated mixing control system led to longer cycle times and how this issue was resolved. The result is a better understanding of auxiliary feed system limitations, reduced cycle times and improved overall mixed compound quality.