A wax pattern is an intermediate manufacturing object, not simply a miniature copy of the finished metal part. Its geometry must account for the production route and survive handling, assembly and shell preparation. Wax pattern design therefore connects the drawing to several operations that occur before pouring.

Dewaxing removes pattern material from the prepared investment mold. A problem at this stage can compromise the shell before metal enters it, making early detection especially valuable. Investigating dewaxing defects requires attention to the pattern assembly, shell condition and removal sequence rather than treating every crack as the same problem.