I don't know if there is an "Official way", but I look at the size of the wall hanging and how much appliqueing there is to do. You are going to want some quilting on it and more as it gets bigger to stabilize the wall hanging and keep the layers in the right place. On smaller wall hangings, a lot of times....I will use a light stable batting and do my blanket stitching by machine on just the batting and top. When I am done with this I will go head and apply the backing. Sometimes I will do some light quilting on it then to stabilize it. I have also done machine embroidery on wall hangings. On those I usually just stitch out the motifs using the stabilizer recommended in the hoop and do some quilting after the quilt is put together.