Designs major components or major portions of a functional system to develop or improve products and facilitate manufacturing operations. Develops basic data and makes preliminary layouts, sketches, and notes necessary to present design proposal. Investigates pertinent design factors such as ease of manufacture, availability of materials and equipment, interchangeability, replace ability, strength-weight efficiency, and contractual specification requirements and cost. Coordinates with other organizations affected by design development. Makes layouts of complex assemblies and details parts of devices, mechanisms, and structures. Checks completed layouts and drawings for clarity, completeness, conformity to standards, procedures, specifications, and accuracy of calculations and dimensioning. Identifies design errors, omissions, and other deficiencies, and recommends revisions and/or improvements in design layout to responsible engineers or designers.