The bar is smaller or langer according to its calculated duration. As the first row marks the timeline your activities are displayed as a bar more left or right in its row depending on its start and end date. You enter activities in the first column of a spreadsheet. In a gantt chart all activities are displayed as bars in separate rows. Definition: What is a gantt chart? A gantt chart can be defined as a traditional project management tool to visualize the project schedule and to monitor the progress of project activities. In this article, we'll cover all the important questions relating to gantt chart tools on macOS. Which functions do they offer and how do you find the right application to fit your requirements? Gantt charts are a core part of the project planning process. Pert Chart Software Good Free Project Management Software For Mac Pro.