Open-floor offices, non-stop emails and chat messages, several meetings scattered throughout the week and the day.
This kills productivity and increases stress and fatigue for people that need to concentrate to work on complex stuff. There's also the time you need to properly switch contexts.
I turnt the post-it note sideways, wrote `FOCUS TIME`, and put it on my temple, to block out my vision in that direction.
I joked about it with my team before, and then just did so when I felt comfortable enough with them. I utilize this strategy at home for deep focus in a chaotic living room setup.
2x Post-its, baseball cap, and over-the-ears noise-cancelling headphones is peak `focus-time` I've found.
I occasionally use them while I’m working for the reason you mention.
I love my pash. Highly recommend.