What is the process and planning to build a festival mainstage?

The brief

I have 0 knowledge of architecture and engineering, just a guy that loves music festivals. Here is a photo of Defqon 1 2024 mainstage. What happens from design all the way to building the stage of festivals such as Defqon 1, Tomorrowland and Ultra etc. submitted by /u/Better-Rooster-6120 [li...