Abstract: One embodiment of a data processing system for generating and managing a plurality of event production documents. The data processing system comprising a computing device operating a software application and connecting to a plurality of tablet computing devices over a network. The event production documents comprising show flows for managing event productions. The show flow comprising a plurality of predetermined columns and rows, or cues. The data processing system comprising a plurality of modes for designing, rehearsing and executing the event production. Cues are able to be added, removed or edited in real-time. The plurality of predetermined cues and timers are automatically updated based on predetermined logic functions associated with a plurality of classifications of cues. Advancing cues shares associated real-time updates with connected computing devices operating a companion application. Users are able to create, edit and save private notes using the companion application.