Human factors engineering is a science that uses a systems approach to consider human psychological, social, physical, and biologic characteristics and applies the information to design equipment, processes, and environments to optimize human performance, health, and safety1.
One of the applications of human factors engineering is forcing functions, which are design features that prevent users from making errors or performing unsafe actions2. For example, a forcing function can prevent a user from inserting a wrong key into a lock, or plugging a wrong device into a socket.
In the case of the defibrillator pads, a forcing function could have prevented the delay by making the pads incompatible with the wrong defibrillator, or by alerting the user of the mismatch before attempting to use the device. This would have ensured that only the correct pads were used with the correct defibrillator, and avoided the potential harm to the patient.
The other options are not applications of human factors engineering, but rather methods or strategies that can be used to improve quality and safety in health care. Checklists are tools that help users remember and follow a series of steps or tasks3. Resiliency efforts are actions that help users cope with and recover from adverse events or situations. Usability testing is a process that evaluates how easy and effective a product or system is to use by the intended users. References: 1: Human Factors in Healthcare | SpringerLink 2: Human Factors Engineering | PSNet 3: Checklist Use in Healthcare: A Practical Guide to Improving Quality and Safety : Resilience in Healthcare: A Systematic Review and Synthesis of the Literature : Usability Testing of Medical Devices
