The main advantage of a Gantt chart is that it makes it easy to understand the steps required to complete a project, thus enhancing organization and improving the chances of success. Its major pitfall is its potential to become overly complex; if the project is big, the Gantt chart can become large and difficult to read. Most large organizations hire project managers to handle various details of the project.
Another notable advantage of Gantt charts is that they help set, identify and achieve the key milestones of a project. Since there is a graphical representation of how each project resource has been allocated and scheduled, the project management team remains on the same page regarding expectations and deliverable due dates.
A significant drawback of the Gantt charts is its inability to clearly establish how much work each individual task will involve or the amount of resources a task will require. This provides an incomplete picture about the scheduled tasks, which may in turn cause unexpected issues as the project gets underway.
The Gantt chart was invented in 1917 by Henry Gantt, a management consultant and mechanical engineer. Due to the relative complexity of the Gantt chart, some managers have questioned whether this method is ideal for small businesses.