A professional who examines engineering drawings of military and commercial parts, assemblies, and installations to detect errors in design documents. Responsibilities include:

• Compares figures and lines on production drawing or diagram with production layout, examining angles, dimensions, bend allowances, and tolerances for accuracy.
• Determines practicality of design, material selection, available tooling, and fabrication process, applying knowledge of drafting and manufacturing methods.
• Confers with design personnel to resolve drawing and design discrepancies.
• May specialize in checking specific types of designs, such as mechanical assemblies, microelectronic circuitry, or fluid-flow systems.
• May operate copier equipment to make duplicates of designs.