System engineering is like playing with a giant puzzle! A puzzle has a lot of tiny pieces that need to fit together to make the picture complete. In the same way, a system has many different parts that need to work together to make it function properly.
Now, imagine building a really complex thing, like a car or a computer. It's not just one piece you need to put together, but lots of pieces that all fit together to create the finished product. System engineering helps people figure out how to make all these different pieces work together in the best way possible.
To do this, system engineers think about a lot of different things. They think about how the different parts will work together, what kind of materials to use to make sure the parts fit together correctly, and how to make sure that the end result is safe and works well. They also need to make sure that the finished product meets all the requirements that were set at the beginning of the project.
Basically, system engineering is all about using science, math, and creativity to make really big and complicated things work perfectly!