Why is modular design advantageous for robotics projects?

• A. It may increase overall cost without benefits.
• B. It reduces the need for testing.
• C. It makes maintenance easier, upgrades simpler, and parts reusable.
• D. It provides a single rigid structure with no flexibility.

Answer: (C)

Modular design means building a robot from separate, interchangeable pieces with clear interfaces. This makes maintenance easier because you can replace or repair just the faulty module without touching the rest of the system. Upgrades become simpler since you can swap in a newer version of a module—like a better sensor package or drivetrain—while leaving the overall architecture intact. Parts also become reusable because the same modules can be used across different projects, saving time and resources. Testing and debugging are more manageable too, since each module can be verified independently before full integration. Overall, modularity provides the flexibility to customize, scale, and improve a robot without redesigning it from scratch.