THEA - A Reference Guide
S Pocock, Robert E. Fields, Michael D. Harrison, Peter R. Wright · 2001
THEA is a technique designed to help anticipate human-computer interaction failures. It has been developed within the Dependable Computing Systems Centre (DCSC) at York for use by systems engineers. Human factors knowledge is not necessary for the application of the method. It is intended for use early in the development lifecycle as design concepts and requirements concerned with safety, usability and functionality are emerging. The technique employs an embedded cognitive error analysis based on Norman's model of human information processing and does not presuppose any formal knowledge of human factors or cognitive psychology on its users. This report is based upon, and updates, a previous University of York Technical report (YCS294) (Fields et al., 1997). 2 Table of Contents 1 THE HUMAN ERROR ASSESSMENT PROCESS .................................................................................. 5 1.1