It is an architect’s structure. The challenge is the shoulder fit and the body shape, beyond the regular one-piece rectangle work. The shrug-based cardigan is made of 3 pieces, the left and right half which include The shoulder, sleeve, and cuff, The body is a rectangle and knitted with ridged ribbons stitch, Optional short rows at the back armpit give a perfect fit, and it is good for all figures.

4- page of the PDF includes a chart, drawings, photo tutorials, and written descriptions.

Tech. sts.
Knit
Purl
Knit 2 together
Yarn over