How engineers use systems thinking to design solutions
Examples of systems in everyday life
⚙ System Diagram Builder
Select a system from the dropdown to view its Input → Process → Output → Feedback diagram. Click components to learn more.
Click a component to learn more.
👥 Feedback Loop Simulator
Adjust the setpoint and see how a negative feedback loop corrects the system output over time.
What Is a System?
A system is a set of interconnected components that work together to achieve a goal. Every system has: inputs (what goes in), processes (what happens), and outputs (what comes out).
Most systems also have feedback loops — the output influences future inputs, allowing the system to self-regulate. A thermostat is a classic example.
Why Engineers Think in Systems
When designing solutions, engineers must consider the whole system — not just individual parts. Changing one part always affects other parts. Systems thinking helps engineers predict unintended consequences and design more reliable solutions.
Example: Adding a lane to a highway seems like it would reduce traffic, but it often increases it (Braess's Paradox) because more lanes attract more drivers.
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Everything Is a System
Your body is a system of systems — digestive, circulatory, nervous, skeletal. A city is a system of transportation, utilities, governance, and commerce. Even a pencil involves systems: forestry, manufacturing, distribution, and recycling.