I think this will be helpful to those of us who are trying to undrestand and achieve better fit. I found an interesting feature on Peggy Sager's site :
To find out how much ease you need in the bottom half of your body, wrap the tape measure around the widest part of your hips and while holding the tape measure, sit on a chair. Allow the tape measure to slip through your hand while it enlarges and read the circumference at full sitting. The difference between this sitting hip measurement and your standing hip measurement is your ease. You actually don't need your ease to get a garment to have correct circumference, more importantly you need your sitting hip measurement. All garments should be made to equal that number.
This make sense to me but I must admit that I never used this method to calculate how much ease I need to add at the hip line.
Have already tried that method and does it work ???
Thanks for your comments and answers.