Much is talked about cognitive ergonomics and how it is used in new technologies and designs. The process of getting there is just as important as it sets the tone for all the research. As time has gone methods and theories have been refined. First there was Hierarchical Task Analysis which was published in 1992 by Kirwan and Ainsworth. Also in the 90s works published included Hutchins “Distributed Cognition” and “Activity Theory” by Nardi. Now in the 2000s we have seen more works pop up including the “Cognitive Task Analysis”.