Reference scenario

Okay, imagine you are playing with some toys and you decide to build a house. You start with a basic plan in your head of how it should look and what kind of materials to use. This basic plan is like a reference scenario.

Now, as you start building your house, you might make some changes to your original plan based on things like the size of your toys, the materials you have available, or maybe you just want to try something new. These changes you make to the original plan are like different scenarios.

So, a reference scenario is like a starting point or a blueprint that helps guide you in making decisions about how to build something or what to do in a certain situation. It's basically like having a map that shows you where you want to go, so you can make changes and adaptations along the way to achieve your goal.