@Easytoconfuse i’m from an engineering family - dad (mechanical), both grandfathers (electrical x2) (one actually worked on this site and may have known AL historically) as a result I know masses of them.
standard quip is “if all else fails read the instructions” so I’m not sure that they would necessarily have read the sign on the door!
Through you do get a beautiful process diagram for cooking Christmas dinner. That one blew my SILs mind (none engineers in sight in her family or their friends as far as I can tell).
It blew our families mind that it was novel to her as for us it was just accepted. When I shared this on social media all the engineers/ children of engineers I know started sharing theirs too.
Admittedly my Dad’s version (retired, strong traits of neurodiversity) was the most carefully created with ruler drawn lines and colour coding but the diagrams existed in houses up and down the UK (and a few abroad too). The engineers approach to planning a complex meal.
Now my Dad is dead and if my SiL cooks a roast type dinner she creates her own as do my siblings and I.
The diagram sharing has become an annual tradition with some of my friends and our WA group will ping with pictures. Partly I think driven by me as it’s a way to remember my Dad at Christmas. One of my close friends, an engineer, unexpectedly died two years ago, Christmas 2024 her bereaved partner joined the chat as the diagrams had apparently become part of their Christmas tradition too and he was also using the opportunity to remember her with people who loved her. In fact he told us that she used to spend longer on the diagram as she knew she would be sharing it!!