An activity diagram is a simple and intuitive type of a flow chart which enables analysts to present a robust and easy visual of the workflow of a business use case. The objective of activity diagram is to show various activities taking place in an organization in different departments. Different departments in any organization like HR, Accounts, Sales, etc. have access to the screens that relate to their fields but activity diagrams highlight the differences in the departments which help the developers when they code and design. The important elements in Activity diagram are initial nodes, control flows, activities, decisions, guard conditions, a fork and join and end nodes.