Chemical engineering is primarily the application of chemical principles to industrial processes and environmental problems that resulting a change in composition and properties of matter to benefit society and the environment. Thus, chemical engineers play an important role in the design, development, construction and operation of industrial processes for the production of diverse range of products as well as in commodity and specialty chemicals. They can focus on one or more of the following roles: managing scale-up processes from plant to full industrial-scale manufacturing, researching new products from trial through to commercialization, modifying and improving the processing or product lines, as well as designing and commissioning new plants.