This document summarizes Grant Grundy's work on supplier reduction for chemical purchasing. The goals were to thoroughly review suppliers within chemical clusters, develop maintain and exit plans for exterior plastic suppliers, and develop cross-commodity strategies for two exterior plastic suppliers. Over 400 suppliers were examined, with plans to maintain 205 suppliers and exit 195 suppliers. Specifically, exit plans were developed for Wilbert Plastic Services and US Farathane, while highlighting the significance of supplier reduction in lowering costs and buyer workload.