09/07/2025
Wimbledon Error: Human or System?
During a recent match at Wimbledon, Hawk-Eye—the trusted ball-tracking technology used to make precise line calls—was unexpectedly disabled. While the full details haven’t been confirmed, the incident sparked immediate debate: was this the result of human error, a technical failure, or something more complex?
One useful way to explore this kind of situation is through the Swiss Cheese Model of accident causation, developed by psychologist James Reason. This model suggests that in any complex system—like the one operating behind the scenes at Wimbledon—there are multiple layers of defence, such as technology, processes, and human oversight. Each layer can have weaknesses, represented as "holes," and when those holes line up across the layers, a failure can slip through. In other words, major incidents are rarely caused by a single mistake—they’re usually the result of several small breakdowns happening at once.
If the Hawk-Eye issue was more than just a technical glitch, it may reflect this kind of layered failure. For instance, a fault in the system might have gone unnoticed because procedures for monitoring or manual intervention weren’t clearly defined or triggered quickly enough. This leads into the field of human factors and ergonomics, which studies how humans interact with technology and systems. Experts like Wilson and Pheasant argue that well-designed systems should not only support human performance but also anticipate and help recover from error.
In highly automated environments, like those involving Hawk-Eye, there’s also the risk of automation bias—where human operators may become too reliant on the system, reducing their attention or delaying action when things go wrong. If operators were unclear about whether they had the authority or tools to override the system, or if the system’s failure wasn’t communicated clearly, those are design and organisational issues—not just individual ones.
So, was it human error or system failure? The more likely answer is that it may have been both, working together in a way that no single person or machine could have entirely prevented. Looking at it through the Swiss Cheese Model reminds us that in complex systems, it’s the interactions and weak spots between layers—technical, human, and organisational—that often open the door to failure.
