Human factors engineering focuses on designing systems and processes that account for humancapabilities and limitations to improve safety and performance. Using checklists to complete complicated tasks (Answer D) is a prime example of applying human factors engineering to enhance patient safety. Checklists help ensure that critical steps in a process are not overlooked, reducing the likelihood of errors, especially in high-risk, complex tasks such as surgical procedures or medication administration.

The other options, while important for patient safety, do not specifically represent human factors engineering:

Performing a root cause analysis on events of harm (A) is an investigative process for identifying underlying causes of errors, not a human factors engineering intervention.

Providing simulation training for high-risk patient care tasks (B) is an educational approach to improving skills and preparedness, not directly related to system design.

Having a second person check medication calculations (C) is a safety double-check but is more of a verification process than a systemic design change.