I know what she meant but I don’t quite understand the instruction. I tried to make the pattern from hip circumference but how can I determine the waistline? If I added it by the same formula, isn’t that turned out to be the same with if I make the pattern from waist circumference? Here is my pattern:

B1 is hip side, B2 is hip back. I used Hip circumference/6.28 formula. B3 is waist back (calculated by the same formula with how I get hip radius), B4 is also waist back (if using hip length from waist back; say 19cm), B5 is waist side (using hip length from waist side; 19.5cm). From the picture, if I join the B4 and B5, the waist circumference is too small. But if I used B3 as waistline, what is the difference with using waist circumference formula from the start? Also, the skirt length would be too short. Maybe you could explain what I do wrong?
Edit: I add the hiplength into the formula for hipline (hip circ/6.28+hip length from waistline). Is this the way to do it?
Btw, I compare the circle skirt made from hip circ and the usual skirt, it seems the new skirt is slightly bigger.
