These engineers have to use their imagination and technical knowledge to solve practical problems and provide a better standard of life to mankind. The main work an engineer does, however, is to design and develop economical and efficient products. They design and test components and fit them in an integrated pattern. They also have to determine the overall effectiveness, cost, reliability and safety. Engineers qualify and specialise in different branches of engineering and involve themselves in the work exclusive to their area of specialisation.
Engineers also work in maintenance, production, or testing.
They test products for quality control and supervise production units. Today, however, many engineers opt for engineering management or sales where their engineering background facilitates the marketing process and installation planning. Some engineers design industrial machinery and equipment, while others may be involved in consumer goods, electrical, electronic equipment or construction of highways, buildings, dams and bridges. Engineers in defence design equipment and weapon systems, while a bio-medical engineer works to apply engineering techniques for the manufacture of medical equipment. Engineers consider many factors when developing a new product.