Objectives: This project developed a taxonomy to provide guidance in selecting remedial actions to address problems uncovered during root cause analyses of events in a medical setting. Methods: The taxonomy incorporates the work of Norman, Rasmussen, van der Schaaf, and others to characterize and classify the failures that lead to an event. The classifications are then linked to likely efficacious actions, and possible solutions are ranked by the likelihood that they would be effective in addressing the identified problems. Results: The project developed a taxonomy that suggests types of remedial actions likely to prove efficacious, as well as those that usually fail to have any effect. Conclusion: This system could assist when addressing safety problems. The system presented here still requires testing and refinement.