This mixed-method research investigates the routines that enable a production system to be safe and operationally effective. We focus on the notion of a joint management system, a specific case of an integrated management system that encompasses safety and operations at the level of daily routines. We use a series of ten case studies to examine the content of joint management systems and offer detailed insight into the overlap in routines between safety management and operations management. The results detail the critical routines that such systems encompass. We then use a sample of 198 facilities to confirm that joint management systems are associated with this specific set of routines and show that these routines bundle together.