In psychology, the individual is the prime focus of attention; the ways in which we are similar to, and differ from, other people and what makes each of us unique is a particular blend of measurable individual characteristics. If we can better understand the nature of these characteristics (or traits or dimensions) and link them with particular job requirements, then we should be better able to predict job performance, including safety requirements, and we might also be better able to select for, and tailor training toward, those individual characteristics. Thus, understanding relevant aspects of personality should help in managing workplace safety.