1)Use dress back foundation to waistline only as a guide. Draw yoke and pleat lines,; then reduce 1” at the waistline and mark sections A to E.
2)Bring sections B and C together to reduce at waistline.

3) Separate yoke section from back; then slash along pleat lines, and spread about 1-1/2” for each pleat. Allow seams and make corresponding notches.