Basically, I just came up with it myself. First I decide if I wanta dress that has a waist down skirt or a bodice down skirt. Most of the ones I have made are skirts that attach to a bodice (i.e. no defined waistline). Then I get the necessary measurement from the bodice to where I want the bottom of the skirt to be. Remember, no hemming is necessary because you use the hem already sewn into the shirt. Then I lay the shirt out flat and measure up from the center bottom the proper length of the skirt I want, an add 1" for the seam that will joint the skirt and the bodice. I draw a line across the shirt at this point. Adjust the line to ensure it flls JUST BELOW the button above it. That way when the seam is sewn the remaining button closure on the skirt will look correct. Next I cut out of disassemble the sleeves and the collar from the shirt. Now I find a commercial (McCall's or Simplicity or Butterick) pattern for the size dress I want to make that has either a yoke or a top piece that establishes the correct size armholes, shoulder and neckline for the size I want to sew. Then I use that piece to center on the upper part of the shirt and cut the bodice out. Then I use the sleeves tp cut bias binding for he sleeves, and any other edge in my design that needs a bound edge. If you will look at my projects, you will find another shirt dress that I also used the collar from the shirt on the front of the bodice. It was made from a bue shrt. After you have designed and fitted your bodice, sew it together, and complete all the details such as armhole binding, etc. Now gather the skirt up to fit the bodice bottom and attach. Rather than leave a raw seam at the waist, I also cover that seam with left over bias from the shirt. One could also use bias tape. And, wahlah!!!!! you have a little shirt dress, all finished!!! Hope this helps you out. If you have any questions, let me know. Just have fun. I also made a couple of dresses that I used the shirt sleeves to make a halter top sundress for the bodice. There are no rights and wrongs. You will also notice on the blue dress that I took the pocket off of the shirt and replaced it in the correct position on the little blue dress. I try to use as much of the shirt fabic as possible. Good luck!!!!