I've often thought that Factorio needs a comment block / sign post / notepad for just such a thing

I often leave my reminder on a post-it note on my monitor. Sometimes those get lost and then I have to depend on my own memory (dubious)

Recently I was in the middle of fixing up a facility that wasn't working right when opposite sides of my base got hit hard by bugs. They broke through walls while I was travelling to repair the first attack, just a mess all around.

Anyway, I decided I didn't want to deal with the cleanup right away because it was already getting late, so I left a sticky note. Then it took me a couple days to get back to the game and the note went missing. I remembered to clean up and shore up the defenses, but I forgot that the thing I had been working on before the attack wasn't quite finished. Came back to it a week later to see why my resources weren't getting shipped before I realized what happened.