Lei, J., Guan, P., Gao, K. et al. (2014). Characteristics of Health IT Outage and Suggested Risk Management Strategies: An Analysis of Historical Incident Reports in China. International Journal of Medical Informatics. 83(2):122-30.
The authors identified and characterized 116 health information technology outage incidents in China. They found that about 70% of outages occurred in the morning and over 50% disrupted patient registration and payment systems. The main causes for outages included software defects, overcapacity issues, and malfunctioning hardware.