The best time to give feedback for a mistake might not be when you think it is! For repetitive tasks, the best time to give feedback might not be right after a mistake has been made but after some...

Suppose we need to test 100 people for coronavirus. Say each test takes 5 minutes; so a single machine can do it in 8 hours and 20 minutes. We can reduce that to 5 hours using basic group testing. ...