https://www.google.ru/search?newwindow=1&biw=1067&bih=750&tb...

--------------------------------------------------
Note added at 11 мин (2018-10-20 10:00:08 GMT)
--------------------------------------------------

Federal Wage System Job Grading Standard for Sewing Machine Operating, 3111

SEWING MACHINE OPERATOR, GRADE 3
General: Grade 3 sewing machine operators have a basic knowledge of sewing machine operation. They do sewing involving minor alinements and positioning of material or mending of utility organization items such as hospital pajamas, blankets, linens, canvas pouches, and fatigue clothes where usefulness of the item is more important than the appearance. Below are examples:
In sewing new items:
- Basting edges with basting machine;
- Using button sewing machine to sew buttons on marked locations;
- Binding straight edges of material;
- Turning material under and sewing straight hem in small items such as pockets or upper edge of cuff for garments;
- Hemming press covers;
- Taking in seam allowance by sewing straight edges of pillow cases;
- Using bartacking machine to install labels or tack finished parts.
In mending or altering items:
- Mending tears or rips by straight stitching;
- Darning;
- Replacing buttons;
- Shortening or lengthening work trousers or other garments used for utilitarian purposes.
https://www.opm.gov/fedclass/fws3111.pdf