Engineering

Engineering is the use of natural science, mathematics, and the engineering design process to solve problems. It helps make technology better, work more efficiently, and be more productive. The main types of engineering are civil, mechanical, electrical, and chemical. Engineers design buildings, machines, new materials, and energy systems.

The steam engine, the major driver in the Industrial Revolution, underscores the importance of engineering in modern history. This beam engine is on display in the Technical University of Madrid.

Engineering began a long time ago with simple tools like levers and pulleys. Ancient buildings such as the pyramids and the Parthenon show early engineering skills. Engineering grew a lot during the scientific and industrial revolutions. This led to inventions like the steam engine that powered ships and trains.

Engineers follow rules that stress honesty, integrity, and safety for the public welfare. They test and use simulations to find the best ways to make new products. Today, software helps engineers with every step, from design to testing and manufacturing.

Definition

The American Engineers' Council for Professional Development says engineering uses science to create new things like machines, tools, and processes. Engineers design these things carefully. They make sure they work well and are safe for people to use. This helps solve problems and makes everyday life better.

Engineers think about how things will work in real situations. They plan for what they are meant to do, how much they will cost, and how to keep them safe. This careful planning helps make structures, machines, and systems reliable and efficient.

History

Main article: History of engineering

Relief map of the Citadel of Lille, designed in 1668 by Vauban, the foremost military engineer of his age

Engineering has been part of human life for a very long time. Early inventions include the wedge, lever, wheel, and pulley. The word "engineering" comes from "engineer," a term from the 1300s that meant someone who builds machines for defense.

Ancient places like Egypt, Mesopotamia, Greece, and Rome built amazing structures and machines. Famous examples are the pyramids in ancient Egypt, the Acropolis in Greece, and the Roman aqueducts. These show the skill and creativity of early engineers.

During the Middle Ages and the Industrial Revolution, new technologies like windmills, steam engines, and machines that could follow instructions changed daily life. Engineers such as John Smeaton and Isambard Kingdom Brunel helped build bridges, canals, and steamships, making travel and trade simpler. The Industrial Revolution also started new areas of engineering like electrical engineering and chemical engineering, which still affect our world today.

Branches of engineering

For a topical guide, see Outline of engineering.

Hoover Dam is regarded as a major accomplishment in civil engineering

Engineering is a wide field that is often divided into smaller areas of study. Engineers usually study one main area, but some work in more than one area over time. The main areas of engineering include civil, mechanical, electrical, and chemical. Sometimes, structural, industrial, mining, and materials engineering are also included.

There are many branches of engineering, and each has its own sub-disciplines. These branches help engineers focus on specific problems and technologies.


Type of engineering	Information
Aerospace engineering	Aerospace engineering covers the design, development, manufacture and operational behaviour of aircraft, satellites and rockets.
Agricultural engineering	Agricultural engineering utilizes farm power and machinery, biological material processes, bioenergy, farm structures, and agricultural natural resources.
Biological engineering	Biological engineering studies the application of principles of biology and the tools of engineering to create usable, tangible, economically viable products.
Biomedical engineering	Biomedical engineering is the application of engineering principles and design concepts to medicine and biology for healthcare applications (e.g., diagnostic or therapeutic purposes).
Chemical engineering	Chemical engineering is the application of chemical, physical, and biological sciences to developing technological solutions from raw materials or chemicals.
Civil engineering	Civil engineering is the design and construction of public and private works, such as infrastructure (airports, roads, railways, water supply, and treatment etc.), bridges, tunnels, dams, and buildings.
Computer engineering	Computer engineering integrates several fields of computer science and electronic engineering required to develop computer hardware and software.
Electrical engineering	Electrical engineering focuses on the design, development, and application of systems and equipment that utilize electricity and electromagnetism.
Environmental engineering	Environmental engineering is a specialized field that uses scientific and engineering principles to protect and improve the environment for human health and well-being.
Geological engineering	Geological engineering is associated with anything constructed on or within the Earth by applying geological sciences and engineering principles to direct or support the work of other disciplines.
Industrial engineering	Industrial engineering focuses on optimizing complex processes, systems, and organizations by improving efficiency, productivity, and quality.
Marine engineering	Marine engineering covers the design, development, manufacture and operational behaviour of watercraft and stationary structures like oil platforms and ports.
Materials engineering	Materials engineering is the application of material science and engineering principles to understand the properties of materials.
Mechanical engineering	Mechanical engineering comprises the design and analysis of heat and mechanical power for the operation of machines and mechanical systems.
Nuclear engineering	Nuclear engineering is a multidisciplinary field that deals with the design, construction, operation, and safety of systems that utilize nuclear energy and radiation.
Software engineering	Software engineering is a branch of both computer science and engineering focused on designing, developing, testing, and maintaining software applications. It is distinct from computer engineering.

Interdisciplinary engineering

Main article: List of engineering branches

Interdisciplinary engineering mixes ideas from different types of engineering to solve problems. In the past, naval engineering and mining engineering were important. Today, there are many kinds of engineering, such as manufacturing engineering, acoustical engineering, corrosion engineering, instrumentation and control, automotive, information engineering, petroleum, systems, audio, software, architectural, biosystems, and textile engineering. These areas are studied and supported by groups like the UK Engineering Council.

Sometimes, new engineering areas mix with older ones to create even more specific fields. For example, Earth systems engineering and management combines topics like engineering studies, environmental science, engineering ethics, and ideas about the philosophy of engineering.

Practice

Main article: Regulation and licensure in engineering

An engineer is a person who works in engineering. Some engineers have special titles, like Professional Engineer or Chartered Engineer. Other titles include Incorporated Engineer, Ingenieur, and European Engineer. The FAA also has a title called Designated Engineering Representative for some jobs.

Methodology

Design of a turbine requires collaboration of engineers from many fields, as the system involves mechanical, electro-magnetic and chemical processes. The blades, rotor and stator as well as the steam cycle all need to be carefully designed and optimized.

In the engineering design process, engineers use math and science to solve problems and make things better. They need to know a lot about science to create successful projects and keep learning new things.

When there are many ways to solve a problem, engineers compare each option to choose the best one. They think about things like what materials to use, how safe the product should be, and how much it costs. By thinking about these things, engineers can make plans for building things that work well. Engineers also use computers to help design and test their ideas before building real products.

Social context

Engineering connects with society, culture, and how people behave. Most engineering projects need money from companies, investors, or governments. Some engineering work is done for free or shared openly with everyone.

Engineering changes the world around us. Many things we use every day, like buildings and machines, are shaped by engineering. But sometimes, engineering projects can cause debates. For example, building big dams or making new types of vehicles can have big effects on nature and people.

Robotic Kismet can produce a range of facial expressions.

Engineers help in many important ways, like working on development projects in places that need help after disasters. Some groups, like Engineers Without Borders and Engineers for a Sustainable World, use engineering to make life better for communities in need.

Code of ethics

Many engineering groups have rules to guide their work and keep standards high. These rules help make sure engineers are honest and care about people's safety and well-being. For example, in Canada, some engineers wear a special ring to remind them of their professional responsibilities.

Relationships with other disciplines

Science

Scientists study the world as it is, while engineers create new things. Both science and engineering use mathematics to understand what they see. Sometimes, scientists need to design tools, which can feel like engineering. And engineers might discover new scientific ideas when solving problems.

Engineering and science are related but have different goals. Science tries to understand how nature works. Engineering uses that knowledge to build useful tools. Engineers solve tough problems using practical methods, thinking about safety, cost, and reliability.

Medicine and biology

Medicine and engineering work together to keep people healthy. Medicine uses technology like pacemakers to help the body. Engineering studies the human body to copy or improve how it works. This has created fields like bionics and robotics, where engineers make devices like natural body parts.

The human body can be understood using engineering ideas — the heart is like a pump, bones act as levers, and the brain sends electrical signals. This has led to biomedical engineering, which mixes medical knowledge with engineering to solve health problems.

Art

Engineering and art sometimes overlap, especially in architecture and industrial design. Some engineers think their work is a form of art, making designs that are beautiful and useful. Historical figures like Leonardo da Vinci were both artists and engineers, showing how creativity and skill can work together.

Business

Engineering and business work together in areas like engineering management. These areas focus on managing engineering projects and helping companies grow. Engineers with business knowledge help companies innovate by mixing technical skills with management ideas.