WITH — understanding the conditions that shape performance before something goes wrong

April 14, 20263 min read

Work environment, Individual state, Task demands, Human nature — WITH surfaces error precursors before the task, not after the incident. Be better than yesterday by giving your team a shared language for the conditions that shape what happens next.

Most pre-task safety conversations in high-risk organisations follow a predictable structure: hazard identification, control measures, task allocation, signatures. This is necessary. It is also, on its own, insufficient. What it typically fails to surface is the set of conditions — in the environment, in the task, in the team, in shared human nature — that will shape how performance actually unfolds. The WITH framework exists to fill that gap.

WITH stands for Work environment, Individual characteristics, Task demands, and Human nature. These four lenses cover the categories of conditions that, when present in combination with a critical or high-consequence action, make errors more likely. Crucially, none of them are character judgements. They are observable features of a work situation that can be anticipated, named, and — where possible — designed out or mitigated before the task begins.

Error precursors do not cause harm by themselves. They create the conditions in which a specific action or decision is more likely to produce an unwanted outcome. WITH makes those conditions visible before the action is taken.

W — Work environment

The physical and organisational conditions surrounding the task. Distractions, interruptions, departures from expected routine, confusing equipment layout, degraded instrumentation, workarounds that have become informal norms. The key question: what in the environment is creating competition for attention, or creating conditions in which the task is harder than it was designed to be?

I — Individual characteristics

The current state and background of the people doing the work. Fatigue, illness, unfamiliarity with the specific task or equipment, limited recent practice, knowledge gaps, communication style differences that could affect team function. These are factors to understand and plan for — not traits to assign blame to. The key question: who is doing this work, and what do we need to know about their current state to plan the task well?

T — Task demands

The inherent complexity of what is being asked. Time pressure, high cognitive load, simultaneous or sequential actions, repetitive elements that invite routine drift, irreversible or high-consequence steps, ambiguous goals or standards. The key question: what does this task demand of the people performing it, and does the current situation — staffing, time, conditions — provide adequate resource to meet those demands?

H — Human nature

The shared cognitive features that all of us carry into every task: stress narrowing attention, habit patterns running without conscious oversight, assumption-making under uncertainty, complacency following repeated success, mental shortcuts, and limited working memory. These are not weaknesses of particular individuals. They are features of human cognition that no amount of training eliminates. The key question: which of these normal human tendencies is most likely to be triggered by this specific task in these specific conditions?

Applying WITH in practice

WITH is most useful when it becomes a shared language rather than a form to be completed. A five-minute pre-task conversation using the four lenses surfaces conditions that no individual would have flagged alone, and it creates shared situational awareness before the point where communication becomes difficult. When reviewing an incident, mapping the WITH factors that were present shifts the conversation from 'who erred' to 'what conditions were present' — which is where systemic learning begins.

The framework also provides a language for shifting from old-view to new-view framing: from 'they were complacent' to 'repeated success without consequence reduced perceived risk'; from 'they cut corners' to 'workarounds had become the local norm'. That shift in language is not about removing accountability. It is about placing it where it will produce change.

↓ Download: WITH reference card — four lenses, worked example, old/new view language guide

Gareth Lock is the founder of The Human Diver and Human in the System — two organisations built on a single conviction: that most unwanted events in high-risk environments are system failures, not people failures. Through structured courses, immersive simulations, incident investigation, and keynote speaking, he brings frameworks from military aviation and academic human factors research into the practical reality of diving and high-risk industry. His work spans recreational and technical divers learning non-technical skills for the first time, through to senior safety leaders restructuring how their organisations investigate, debrief, and learn. Everything sits under one guiding principle: be better than yesterday.

Gareth Lock

Gareth Lock is the founder of The Human Diver and Human in the System — two organisations built on a single conviction: that most unwanted events in high-risk environments are system failures, not people failures. Through structured courses, immersive simulations, incident investigation, and keynote speaking, he brings frameworks from military aviation and academic human factors research into the practical reality of diving and high-risk industry. His work spans recreational and technical divers learning non-technical skills for the first time, through to senior safety leaders restructuring how their organisations investigate, debrief, and learn. Everything sits under one guiding principle: be better than yesterday.

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