Why Naming the Stage Matters

The model's practical power is diagnostic. When you analyse a near-miss — your own, or one you witnessed — the useful question isn't "was that bad driving?" but "which stage failed?" Because the answer prescribes the fix:

Observe failure → the fix is scanning, positioning, and removing attention-thieves (the whole of hazard perception, in Hazard Perception).
Decide failure → the fix is not driving impaired, and building the risk-prediction habits of Children in Traffic and The Vulnerable Road User Picture.
Act failure → the fix is following distance, speed choice, and vehicle maintenance (Speed & Stopping Distances and Vehicle Knowledge).

A crash is rarely "the driver was careless." It's a specific stage failing for a specific, addressable reason — and drivers who can locate the stage can change the behaviour. Vague guilt changes nothing; a located failure changes everything. Carry this question through every lesson that follows.

Key takeaways

After any near-miss, ask which stage failed — the answer names the fix, where "that was careless" names nothing
Observe failures are fixed by scanning and attention; Decide failures by not driving impaired and predicting risk; Act failures by distance, speed and maintenance

Quick check

You brake late for a stopped queue because you were reading a message, and stop just in time. Which stage failed, and what does that prescribe?

A) Observe — attention was off the road, so the hazard was perceived late; the fix is removing the distraction, not braking harder

B) Act — your braking was too slow, so practise emergency stops

C) Decide — you chose the wrong response to what you saw

D) None — you stopped in time, so nothing failed