The Real-Time Systems Research Group at the University of York is the internationally acknowledged leader in research into hard real-time systems scheduling theory and worst-case execution time analysis.

This research group is credited with a significant body of research into fixed priority real-time scheduling theory. They have also demonstrated how to employ these theoretical results in practice, by accounting for networking and operating-system overheads.

This combination of theory and practice has resulted in important and practical applications of their work.