If your investigation ends with Human Error, you've stopped too soon

Early in my career, I worked in human factors. Like many people in my team at the time, I was interested in understanding human error, why people made mistakes and how we could prevent them from happening.

When I was introduced to Human and Organisational Performance (HOP) a few years later, it completely changed the way I looked at work – and even more so, investigations.

I realised that "human error" isn’t an explanation at all, and was often where the learning just stopped. In reality, it's where the most valuable questions should begin.

Recognise this line? "We've identified the cause: human error."

It's one of the most common conclusions in incident investigations –  and one of the least useful.

Of course, a person was involved. People make decisions, adapt, solve problems, and respond to changing conditions every day. Simply identifying "human error" tells us who was involved, but it tells us nothing about why the event made sense at the time.

What were they seeing?
What pressures were they working under?
What information did they have?
What conditions shaped their decisions?

These are the questions that uncover learning.

When we stop at "human error," we risk overlooking the factors that influenced performance: unclear procedures, equipment design, competing priorities, workload, communication, environmental conditions, staffing, or organisational expectations.

The goal of an investigation shouldn't be to find the person closest to the event. It should be to understand the system that shaped what happened.

The irony is that the very systems that contribute to incidents are often the same systems that enable success. Every day our people adapt to variability, recover from unexpected situations, and keep work moving.

Those adaptations are usually invisible, until something goes wrong.

An investigation through a HOP lens asks a different question.

Not, "Who made the mistake?"

But, "How did the conditions make this action or decision understandable at the time?"

Because when we understand the context, we don't just explain the past, we create opportunities to improve the future.

The next time an investigation concludes with "human error," try and treat it as the beginning of the conversation, not the end.