Design science methodology is a way of doing things that is used when people want to create something new. This could be a new product, a new process, or even a new way of doing things. The main idea is to use science to help figure out the best way to create this new thing.
Imagine you want to build a sandcastle on the beach. You might start by figuring out what kind of sand is best for making a castle. Then you might experiment with different shapes and sizes of sandcastles to see which ones are the strongest. This is just like design science - you use science to figure out the best way to build something.
The design science methodology has a few steps, just like building a sandcastle. First, you need to figure out what you want to create. Next, you need to do some research to figure out the best way to create it. You might also need to do some experiments to test your idea.
Once you have a good idea of how to create your new thing, you can start building it. This is just like when you start building your sandcastle on the beach. You use what you learned during your research and experiments to build the sandcastle, just like you use what you learned during the design science methodology to build your new thing.
Finally, you need to test your new thing to make sure it works the way you want it to. This is just like when you test the strength of your sandcastle by pouring water on it or seeing if it falls over. If your new thing doesn't work the way you want it to, you might need to go back to the beginning and do more research and experiments.
Overall, design science methodology is a way of using science to figure out the best way to create something new. Just like building a sandcastle, it takes time, effort, and experimentation to get it right.