The eighth principle acknowledges the decrease in the hierarchical nature of work by noting an exception to the principle of separately identifying supervisors from those they supervise. For professional and technical occupations, supervisors or lead workers are to be classified with the workers they supervise. The suggested changes should enhance the capacity to effectively capture changes in work.

With publication of the revised SOC on July 7, 1997, the SOCRPC invited public comment and suggestions for revision. More than 200 responses were received. As a result, the SOCRPC published another revision on August 5, 1998, with a significantly modified hierarchical structure and numbering system. In the proposed revision of the SOC, there are four major levels of aggregation: (1) major group (designated by the first two digits of the SOC code), (2) minor group (designated by the third digit of the SOC code), (3) broad occupation (designated by the fourth and fifth digit of the SOC code), and (4) detailed occupation (the sixth digit of the SOC code). The proposed structure contains 810 detailed occupations, 449 broad occupations, 98 minor groups, and 23 major groups. At the minor group level, older versions of the SOC are compatible with the Census 3-digit occupations, but not identical.

This structure is more differentiated than the 1980 SOC, which enumerated 665 occupations. According to the 1997 version of the revision the number of occupations in computers, design, science, health, law, education, and arts increased from 192 to 286 (about a 50 percent increase), whereas the number of mechanical and production occupations decreased from 246 to 157 (a decrease of 35 percent). These changes are in agreement with the trends in the changing content of work noted in Chapter 4. Military occupations are listed with their civilian counterparts in this revision, except for 20 military occupations for which no civilian counterpart could be found. These occupations make up the military occupations group.

The SOC Revision Policy Committee, noting that it has been 18 years between revisions of the SOC, recommended the establishment of a standing committee, the Standard Occupational Classification Review Committee, to maintain the currency and appropriateness of the SOC to the world of work. We regard the



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