What is the process of assembling and stitching fabric pieces together called?

The process of assembling and stitching fabric pieces together is indeed called sewing. This involves using a needle and thread to join two or more layers of fabric, creating a finished product, whether it's clothing, home décor, or other textile items. Sewing encompasses various techniques and types, such as hand sewing and machine sewing, and is fundamental to many fabric-based crafts and fashion design.

Quilting, while it involves sewing, specifically refers to the technique of joining multiple layers of fabric together, often with padding in between, to create a thick, quilted fabric. Cutting, on the other hand, is the initial process of shaping fabric before it is sewn, and tacking refers to temporarily securing pieces of fabric together before final stitching. The act of sewing serves as the primary method in bringing all these elements together into a finished and functional textile creation.