This is a typical Pattern Puzzle design that I have chosen specifically for the weird shape the front dress pattern piece can make. As one pattern piece for the front, it's a strange and very wasteful shape. Indulgent and fun for a one-of, but not so acceptable for production. It is more likely that it would be cut in three separate pieces with seams hidden under the large drape tucks in the bust and hip area.
You'll find all the pattern making detail on the website blog.