They do not measure stress directly, but base it on a rather narrow rubric of objective factors such as physical demands and travel.

http://www.careercast.com/jobs-rated/2011-jobs-rated-methodo...

Probably that old "publish or perish" thing.

Trying to make book deadlines?

Looking at the actual jobs that get pulled up by clicking on "historian," it looks like they are incorrectly identifying engineering jobs that use a product called "Historian" or talk about "historian data" from monitoring devices as actual jobs for historians.

I would think even a rudimentary spot check would have caught such a glaring error before they published the article.

Credibility fail.