Model-based design is like building a toy house out of blocks. When we want to make a toy house, we first make a plan in our head or on paper, on where we want to put the blocks, what shape we want the house to be, and how many blocks we need. This plan is like a model of the toy house.
In the same way, model-based design is when engineers and designers use computer programs to make a virtual model or a plan of a real-life thing they want to build, like a robot, airplane or even a car. They use special software to create a design that looks like the real-life object with all its parts, movements, and features.
Once the model is created, engineers and designers can test how it will work before building the real object. They can simulate and see what will happen if they change different parts of the model, or if they use different materials. This helps them find and fix any problems or errors before actually building the real object, saving time, and money.
So, model-based design is like building a toy house out of blocks, but instead of blocks, engineers and designers use computer software to create a virtual model of a real-life object to test how it will work before building it in real life.