Engineering design services design or revamp components, products, systems or equipment. They vary in terms of capabilities and are located across the United States and around the world. Some engineering design services specialize in load analysis, part specifications, material selection, or the production of manufacturing drawings. Others offer product manuals or provide documentation to help businesses meet regulatory requirements or quality standards. Because the engineering design process involves many different activities, the selection of an engineering design service requires careful analysis. In general, a front end engineering firm needs to select an engineering design service based on criteria such as experience, capabilities, and specialization.