Filter like Excel inside course

Hello Emily02​ .
If I understand correctly...
I wondered if arranging the machine-by-machine process in different scenes would be easy to manage, when you have to jump from slide to slide and scene to scene to see the entire process. I don't think so. 
I thought about it while making a quick demo.
I arranged all the machine-by-machine processes in the same scene: it's easier to visualize. Each slide must be clearly named.
NB: disable the built-in PREV and NEXT buttons on each slide, as well as the swipe actions, to keep a consistent Storyview.
There is only one TRUE/FALSE variable: run_entire_process. I thought this was the best process for teaching purposes, so the variable is TRUE.
There is a button to toggle this variable if you want to view the process by machine, so run_entire-process = FALSE
All you have to do now is create a NEXT button on each slide, which takes you to the slide (next step on another machine) if the variable is TRUE, otherwise to the slide (next step on the current machine) when the learner clicks on the NEXT button.
(I have followed your chronology of steps)
NB: For greater immersion, you can trigger a lightbox (for the Machine A process) after a timer (e.g., 1 min showing 30 min) triggered at the beginning of the Machine A “preheating” slide has finished: place it on the base layer. 

Let us know if this helps. Merry Christmas.