According to James Reason, which condition refers to enduring systemic problems that lay dormant for some time and combine with other system problems to weaken the system's defenses and make errors possible?

• A. Active conditions
• B. Latent conditions
• C. Cognitive conditions
• D. Human conditions

Answer: (B)

In James Reason’s safety framework, enduring systemic weaknesses that lie dormant and only become problematic when they align with other problems are called latent conditions. These come from design flaws, organizational policies, resource constraints, and other structural issues in the system. They sit in the background, not causing harm by themselves, but when an active failure occurs or when other failures emerge, these latent conditions weaken defenses and make it more likely that an error will lead to harm. Think of the Swiss cheese model: each layer of defense has holes, and latent conditions are the hidden holes that may not be evident until they line up with holes in other layers at the moment of a mistake. Examples include under-resourced staffing, insufficient training, unclear procedures, or poor system design that hasn’t been updated, all of which create latent vulnerabilities over time. The other terms describe more immediate or individual factors, whereas latent conditions describe these long-standing, systemic weaknesses that quietly set the stage for errors.