If we are to study humans to build a computer system that serves their behavior, it is their behavior that we must study. Studying human behavior—their actions—is the basis for usability science, since usability implies "use"—an action. Those who do not use the information system are neither qualified to be studied, nor to invoke their untested solutions onto those who are—in this case, doctors, nurses, allied professionals, and the like.
Nevertheless, clearly most doctors, nurses, and allied professionals are not qualified to design a computerized informatics system, at least one that is based on their personal needs, devoid of their biased wants.
Therefore, we must study the actions of the individuals who submit care to others so that we can cater to their needs. We will not be concerned with criteria other than those actions, and those dynamic needs.
As a side note: Some of you may be programmers skilled in object-oriented languages, such as Ruby. For the purpose of this study these languages may be best employed if methods are prioritized over their objects, not visa versa; the point may seem moot, and theoretical to some, but you may come to agree with the point as it develops. For now, I will just mention it.
We can now continue to setup our study of human behavior, beginning with the broadest possible scope, and ending with study of the minutia of human behavior.
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