So for a basic understanding of Garntt Chart, it illustrates project schedules such start/end dates of activities, important activities, and more. It is useful in the medical device field because this chart can constantly be updated, it provides a simplistic view of phases in the planning process. It can also indicate critical points in the plan. The cons of a Garntt Chart is that it does not show how complex a project is. It is also not so accurate when representing the true schedule performance status.