It's the correct term in the fashion industry.
"Fabrication is the act of taking raw stock material and turning it into a part for use in an assembly process. There are many different types of fabrication processes.
Understanding clothing fabrication requires knowledge of many factors, including materials, sewing techniques, design principles, and more."
So when they refer to the fabrication they're talking about not just the fabric itself, but the way the design uses it and the way it's been sewn.
