ERP I, ERP II, & ERP III Abstract ERP applications integrate enterprise operations within and across enterprise legal entities, or company codes. ERP ii (or ERP 2) applications extend supply functionality to external enterprises (generally vendor-affiliated companies or enterprises) to reduce cost, improve supply chain efficiency, and perform collaborative innovation. ERP iii (or ERP 3) enterprises go to the next level as they integrate the ERP and ERP ii functionality to include customers [...]