Answer:
The manager can make a written announcement and paste it on the notice board Or he can use email and put all heads of departments in CC
Step-by-step explanation:
In any organization there is a notice board for daily announcements or any notice under consideration. The quickest and easiest way to make an announcement is through that notice board because certain employees do not have email addresses such as gardeners and peons. Emails should be sent to the heads of departments and they will then convey the message to their subordinates.