What Is Systems Engineering?
Systems engineering is an interdisciplinary approach to designing and managing complex systems over their entire lifecycle. It focuses on how to design, integrate, and manage complex systems to ensure they meet requirements reliably and efficiently.
Unlike traditional engineering which focuses on components, systems engineering considers the whole system — including how parts interact with each other and with the environment.
The V-Model Lifecycle
The V-model is the standard systems engineering development process. It has two sides:
- Left side (decomposition): Requirements → System Design → Subsystem Design → Component Design
- Right side (integration): Component Testing → Subsystem Integration → System Integration → Acceptance Testing
Each level on the left pairs with a corresponding test level on the right. This ensures that every requirement is verified by a specific test.
System Decomposition
Complex systems are broken down hierarchically:
- System: The entire product (e.g., an automobile)
- Subsystem: Major functional groupings (e.g., powertrain, electrical, chassis)
- Component: Individual parts (e.g., alternator, brake caliper)
- Element: The smallest unit considered (e.g., a bolt, a chip)