Regional Basic Professional Training Course in Korea

11. Human Performance: A Perspective on Human Factors
implemented. Prior to its execution, it can be assessed according to whether or not it has
sufficient contingencies, displays soundness of judgment, imagination, flexibility,
awareness of detail and the like.
There is no universally agreed classification of human error, nor is there one in prospect.
A taxonomy is usually made for a specific purpose, and no single scheme is likely to
satisfy all needs. Nearly everyone who has published in this field has devised some form
of error classification. Consequently, the literature abounds with such taxonomies,
reflecting a variety of practical concerns and theoretical orientations and ranging from the
highly task specific to broad statements of underlying error tendencies.
A. Model of Violation
Figure 11.1 shows the graphical model of violation. Although the person has a good
understanding of the “prescribed task”, he/she develops an intention not in compliance
with his/her understanding. The reason for this may be derived from different sources
(internal or external). This kind of behavior is called a violation. As an example, the
operator wants to follow his “personal intention” due to personal motivation (e.g., the
operator does not follow the procedure in order to go home earlier etc.). In this case the
operator is fully responsible for his/her action.
There are other cases, in which the part of responsibility must be investigated in more
detail and more general situations must be taken into account. For instance, (a) the
person wants to satisfy other criteria like personal safety aspects, power production or
even the efficiency of the larger project that includes this particular task.
Recommendations have to be addressed to this kind of compromise, something must be
done to clarify the decision making; (b) the person thinks that he knows a better solution
than provided by the procedure; (c) the person can't perform the task because the
❙ 713 ❙