Unskilled DOT Codes with Two SOC Groups

With about 3,000 unskilled DOT codes collapsing into 173 SOC groups that contain those unskilled DOT codes, the criticism of the O*NET and the SOC structure has centered around the issue of data aggregation: clumping the different DOT codes together.  I found eight DOT codes for which the opposite is true:  the DOT treats as a single occupation that Labor placed into two different SOC groups. 

These occupations require greater care when assessing the number of potential jobs on the occupational employment matrix.  That task would require use of two employment projection matrixes.  The occupations raising these concerns are:

DOT	DOT TITLE	SOC	SOC TITLE
317.684-010	COFFEE MAKER	35-2021	Food Preparation Workers
		35-3022	Counter Attendants, Cafeteria, Food Concession, and Coffee Shop
https://www.onetonline.org/crosswalk/DOT?s=317.684-010&g=Go
379.367-010	SURVEILLANCE-SYSTEM MONITOR	33-9031	Gaming Surveillance Officers and Gaming Investigators
		33-9099	Protective Service Workers, All Other
https://www.onetonline.org/crosswalk/DOT?s=379.367-010&g=Go
411.364-010	BLOOD TESTER, FOWL	19-4011	Agricultural and Food Science Technicians
		19-4021	Biological Technicians
https://www.onetonline.org/crosswalk/DOT?s=411.364-010&g=Go
421.687-010	FARMWORKER, GENERAL II	45-2092	Farmworkers and Laborers, Crop, Nursery, and Greenhouse
		45-2093	Farmworkers, Farm, Ranch, and Aquacultural Animals
https://www.onetonline.org/crosswalk/DOT?s=421.687-010&g=Go
530.665-010	BEATER-ENGINEER HELPER	51-9021	Crushing, Grinding, and Polishing Machine Setters, Operators, and Tenders
		51-9023	Mixing and Blending Machine Setters, Operators, and Tenders
https://www.onetonline.org/crosswalk/DOT?s=530.665-010&g=Go
530.685-014	PULPER	51-9021	Crushing, Grinding, and Polishing Machine Setters, Operators, and Tenders
		51-9023	Mixing and Blending Machine Setters, Operators, and Tenders
https://www.onetonline.org/crosswalk/DOT?s=530.685-014&g=Go
555.685-066	WHEEL-MILL OPERATOR	51-9021	Crushing, Grinding, and Polishing Machine Setters, Operators, and Tenders
		51-9023	Mixing and Blending Machine Setters, Operators, and Tenders
https://www.onetonline.org/crosswalk/DOT?s=555.685-066&g=Go
806.684-010	ASSEMBLER, MOTOR VEHICLE	51-2092	Team Assemblers
		51-9199	Production Workers, All Other
https://www.onetonline.org/crosswalk/DOT?s=806.684-010&g=Go

Surveillance=system monitor exemplifies the dilemma.  Job Browser Pro does not list the existence of this kind of work in the Gaming Surveillance Officers and Gaming Investigators (SOC 33-9031) occupational group.  That leads to a potential undercounting.  Occu Collect reports:

 33-9031 Gaming surveillance officers and gaming investigators

Typical Education Needed	High school diploma or equivalent
Work Experience in a Related Occupation	Less than 5 years
Typical On-The-Job Training Needed to Attain Competency	Moderate-term on-the-job training
2016 Employment	10,700

Occupations within this group require significant experience and are at least semi-skilled if not skilled (counting the experience and training time together).  The only other occupation in the group is Gambling Monitor (DOT 343.367-014).  The plurality of those jobs do exist in government service, the OOH states:

Gaming surveillance officers and gaming investigators held about 10,700 jobs in 2016. The largest employers of gaming surveillance officers and gaming investigators were as follows:

Local government, excluding education and hospitals	47%
Gambling industries (except casino hotels)	25
Casino hotels	19
State government, excluding education and hospitals	4
Spectator sports	2

When wandering outside of the DOT-designated industry, we must remain cognizant that while the industry designation is an integral and inseparable part of the occupational title, the DOT states:

In compiling information for the DOT, analysts were not able to study each occupation in all industries where it occurs. The industry designation, therefore, shows in what industries the occupation was studied but does not mean that it may not be found in others. Therefore, industry designations are to be regarded as indicative of industrial location, but not necessarily restrictive.

That last sentence is the out that vocational experts can use to evade restricting the occupations to the industry designated.