
The main theme of this blog is "Design and Technology".
Usually, when you want to start designing or creating an object, you will start imagining an image. Then you put that image as the theme of your creation.
Link words will be put around that particular theme and will spread out like a "spider-web" or, in this case, calculation map.
This is what you call a rich picture.
Rich picture is the basic step in the design process.
It enables you to think of the different needs and things to make the objects.
The basic kind of diagram pertaining the rich picture would be the one above: