Measures work piece with instruments such as electronic gauges and optical light, compares work piece dimensions with specifications to ascertain amount of stock to be removed and evaluates types of compounds, diamonds, and laps or material needed to achieve required specifications and setup requirements. Good understanding of chemicals (acids, bases, oxidizers, flammables, reducers, water reactives) in a variety of forms (liquids, solids, gases, sludges, slurries) and related incompatibilities to prevent undesirable chemical reactions.