Problems with Synchronous Work
"In fact, people who try to juggle messages and work see an IQ decline of 10 points — equivalent to missing a night of sleep and more than twice the drop after smoking pot."
According to Harvard Business Review, most of us spend a full 80% of our time communicating with colleagues in the form of planned or spontaneous meetings, emails, chats, and video or phone calls.
The Cost of Task Switching: Switching every ten minutes
It takes 25 to 30 Minutes to find a date for a business meeting with 6-8 participants.