1. Error Classification: Rasmussen
Start
The situation is a
routine situation for
which the operator has
highly skilled routines?
But the operator
executes a skilled
act inappropriately
The act is not performed with
adequate precision (time,
force, spatial accuracy)
Manual variability
The situation deviates
from normal routine.
Does operator respond
to this change?
Operator realizes and
responds to changes.
Is the situation
covered by normal
work know-how or
planned procedures?
The act is performed at
wrong place, component in
spite of proper intention
Yes No
Topographic
misorientation
Does other highly skilled act
or activity interfere with task?
Stereotype
takeover
fixation
Does the operator
realize this?
Familiar pattern
not recognized
Does operator
respond to
proper task-
defining
information?
Does
operator
recall
procedure
correctly?
Other slip of
memory
Mistakes,
alternatives
Forgets isolated
act
Yes, but
fails
during
execution
The situation is unique,
unknown, and calls for
operators functional
analysis and planning.
Does operator realize this?
Operator responds
to familiar cue
which is
incomplete part of
available
information
Familiar
association
short cut
correctly collect
the information
available for his or
her analysis?
Information not seen or sought
Information assumed not observed
Information misinterpreted
Are functional
analysis and
deduction properly
performed?
Side effects or conditions not
adequately considered
Other, specify K n o w l e d g - b a s R u S k i
ISE 412