Workplace violence against health-care workers has intensified; it can endanger the physical and mental health of such workers and can affect the quality of medical services. The incidence of workplace violence in health care exceeds that in other industries. However, it is often underreported. In this study, an interdisciplinary team applied health care failure mode and effects analysis to identify risks in the health-care violence management process of a health-care institution. The results of an analysis revealed 11 potential causes of failure. These results were supported by hazard index calculations and decision data analysis. Six strategies for improvement were introduced: promotion of antiviolence through the use of cards and posters, enhanced education and training, expanded on-site drills, inspection and upgrading of equipment, revision of system regulations, and implementation of regular audits. Implementing these measures reduced overall risk by 45.6% and considerably increased the reporting rate of workplace violence, indicating employees at the institution had a higher level of trust in the system. The intervention helped establish a culture of safety and enhanced health-care quality.