Theres not one hard and fast rule with how to plan your jade piece.
There are some jade pieces that dictate to the maker how it will evolve, but for
the most part, once an idea has taken hold after selecting a chosen piece of stone,
one can either draw directly on the stone, or make drawings on paper.
Some people find maquettes or models made in oil based clay or plastilina can be informative of the shape and orientation in the stone.
At the symposium, oil based clay is provided as well as drawing paper.