It depends on the context. My boss is so busy that he rarely answers to my emails, he is available to talk very rarely (once every few months) so I write him wh

It depends on the context. My boss is so busy that he rarely answers to my emails, he is available to talk very rarely (once every few months) so I write him what I plan to do then I do it. He never answered "no". Even for vacations, I just let him know when I go and for how long, if it is up to a week. I am responsible of my own work and he is just around. My former manager used to do the same. He is a 40 year veteran, retiring in the next few months and for the past 6 years since I met him he wrote many emails telling people what he plans to do and just did it. It works for us very well.