Visualization design process

[loringul]

Hi I'm wondering what exactly the meaning of platform is?
Is it platform such as the tool, email, excel,..?

Information desgin as well, meaning as in data modeling?

Which is the correct order of the visualization design process?

1. A) Platforms, Visual Design, Information Design, Users & Context, Testing
2. B) Users & Context, Platforms, Information Design, Visual Design, Testing
3. C) Users & Context, Information Design, Platforms, Visual Design, Testing
4. D) Platforms, Information Design, Visual Design, Testing, Users & Context