Responsible for the design, modeling, development and testing of a machine, structure or system. Develops functional requirements. Understands and applies standard engineering principles. Creates simulations and prototypes to evaluate preliminary designs and test how a machine, structure or system operates. Designs and tests components, and integrates components to produce final product. Monitors quality of products and controls the efficiency of processes. Evaluates a design's overall effectiveness, cost, reliability, and safety. Investigates root causes of failures to maintain quality and recommend improvements.