You are right, it cannot be left to chance and should not rely on "word of mouth." As I said in my original comment, our DON left typed memos and notes in our break/report room on a bulletin board...
Have never been a nurse manager, in 40 years of nursing. Always at the bedside, because I have never wanted the 24/7 responsibility. So I can only speak as a long time staff nurse. The best nurse...