[RFE] Lab Instructions - high level workflow diagram

[romdalf]

Is your feature request related to a problem? Please describe.
The request came up from the "amsterdam-jan-2020" class session mixing a diverse group in term of skills and roles. The general feeling is that along with the big picture, a workflow diagram for the lab instructions will improve the actual understanding of the steps and interactions between the components.

Describe the solution you'd like
a workflow diagram for the lab instructions

Describe alternatives you've considered
a break down of the big pictures into a flowchart, which could be also incremented with the new elements lab after lab.

Additional context
This is really difficult for none technical profile to understand the flow and potential impact of doing it one way or another.