Glossary of Data Variables for Fatal and accident causation ... - ERSO

Manual For SafetyNet accident causation system (SNACS)
genotypes, look them up in the tables where they appear as consequents).
Here (in the leftmost column) we find two genotypes which are applicable. The
first is “Distraction” (E3), since this encompasses things such as being occupied
by a phone. The other is “Fatigue” (E4), which applies to Kalle's lack of sleep.
Having two applicable genotypes means that the analysis chain now will split
into two separate chains, looking like this:
Genotypes: reasons for the
dysfunctional behaviour
Genotype:
Distraction (E3)
Explanation: Kalle
has his mind on
something else
Genotype: Missed
observation (B1)
Explanation:
Phenotype:
dysfunctional
behaviour
from physics
standpoint
Phenotype:
Genotype:
Fatigue (E4)
Explanation: Kalle
didn’t sleep well
last night
Kalle doesn’t see
that the traffic light
has turned red
Timing: No
action (A1.3)
Explanation:
The vehicle
does not stop
when the traffic
light turns red
Accident
Figure 12: The analysis of Kalle's accident expands
Before we move on, please remember once again that the genotypes and links
are there to make it possible to systematically describe what we know about the
accident, not to tell us why the accident happened. The SNACS methodology
provides a way to sort out the reasons for the accident. It is an organiser of
explanations, not a provider.
Moving on in the analysis of the distraction part of the chains, we locate the
factor “Distraction (E3)” in the table where it appears as a consequent. As the
letter in the brackets indicates, this is in table E, “Temporary person related
factors”. Below the row for “Distraction” (E3) is shown (extracted from the rest of
table (E)):
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