Tsacoumis described two core elements of O*NET—the content model and the occupational taxonomy. The content model, based on extensive research on job analysis (Peterson, Mumford, Borman, Jeanneret, and Fleishman, 1999), organizes job information into six broad categories (see Figure 5-1). There are three types of information related to the individual worker: (1) characteristics, such as abilities the worker brings to the job; (2) requirements for entry into the occupation, including skills, knowledge, and education; and (3) experience required for entry, including training, skills, and licensing. The content model also includes three types of information related to the job: (1) occupational requirements, such as what work activities are performed; (2) workforce characteristics, including information on projected demand for this occupation; and (3) occupation-specific information, including tasks and technology. Tsacoumis explained that within each of these six broad categories there is a wealth of additional information and descriptors (Tsacoumis, 2007b).
Although the O*NET occupational information was originally structured according to the Occupational Employment Statistics classification system of the Bureau of Labor Statistics (BLS), an Office of Management and Budget directive in the year 2000 led to a reorganization of the in-