The medical technology company ConvaTec had a multi-million-dollar equipment rental business, but was still tracking it using paper forms and faxes. While at webslingerz, I worked with them to replace this out-of-date system with an online web application powered by Drupal. The new system allows their administrators and sales users to track inventory and orders, manage device locations, and view usage reports.
Custom permissions and roles let their dealers and hospitals place their own orders and manage their inventory themselves. Custom EDI integration also interacts with their shipping partner to keep inventory and invoicing up-to-date.