Because there are many separate problems to solve in a large engineering project, engineers in one field often work closely with specialists in scientific, other engineering, and business occupations. Engineers often use computers to simulate and test how a machine, structure, or system operates. Many engineers also use computer-aided design systems to produce and analyze designs. They also spend a great deal of time writing reports and consulting with other engineers. Complex projects require many engineers, each working with a small part of the job.
Supervisory engineers are responsible for major components or entire projects.
Many engineers work in laboratories, industrial plants, or construction sites, where they inspect, supervise, or solve onsite problems. Others work in an office almost all of the time. Engineers in branches such as civil engineering may work outdoors part of the time. A few engineers travel extensively to plants or construction sites. Many engineers work a standard 40-hour week.