The document discusses upgrading an existing manufacturing execution system at a pharmaceutical plant to address several issues with the previous system and improve functionality. Key points: - The previous system was not 21 CFR Part 11 compliant, could only run in manual mode, and had limited configuration options. - A new system was implemented using GE Fanuc iFIX to centralize security, integrate recipe management, batch reporting, and work instructions. - The upgrade combined relational data, process historian data, alarms, recipes, and PAT sampling to provide unprecedented views of historical manufacturing data. - Features like batch comparison reporting, alarm frequency reports, and dashboard views were added to help analyze production issues.