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Project managers use Gantt charts for three main reasons:

Gantt charts visualize the building blocks of a project and organize it into smaller, more manageable tasks. The resulting small tasks are scheduled on the Gantt chart’s timeline, along with dependencies between tasks, assignees, and milestones.

Gantt charts can be employed to keep an eye on the logistics of a project. Task dependencies ensure that a new task can only start once another task is completed. If a task is delayed (it happens to the best of us), then dependent issues are automatically rescheduled. This can be especially useful when planning in a multi-team environment.

As teams log time towards issues in your plan, you can monitor the health of your projects and make adjustments as necessary. Your Gantt chart can include release dates, milestones, or other important metrics to track your project’s progress.

There are two main reasons why Gantt charts are loved throughout the project management world. They make it easier to create complicated plans, especially those that involve multiple teams and changing deadlines. Gantt charts help teams to plan work around deadlines and properly allocate resources.

Projects planners also use Gantt charts to maintain a bird’s eye view of projects. They depict, among other things, the relationship between the start and end dates of tasks, milestones, and dependent tasks. Modern Gantt chart programs such as Jira Software with Roadmaps and Advanced Roadmaps synthesize information and illustrate how choices impact deadlines.

Gantt charts can be a powerful tool for both the waterfall or agile methodologies.

The waterfall model of project planning follows a linear approach where stakeholder and customer requirements are collected at the beginning of the project. From that, project managers create a sequential project plan, complete with milestones and deadlines. Every piece of the project relies on the completion of preceding tasks. This is favored by teams that focus on process (such as construction or manufacturing) and less on ideation or problem-solving as the steps need to be planned out in advance.

Gantt charts are typically preferred by project managers using waterfall. They determine a project schedule by breaking projects into manageable chunks of work and assigning start and end dates. It’s also helpful in identifying important milestones in your project. Milestones are accomplishments that teams should achieve on or ahead of schedule. They are optional but recommended.

On the other hand, the agile model of project planning values flexibility and adaptability. Instead of creating a full timeline with set dates, agile teams break projects into smaller iterations (also known as sprints). At the beginning of a sprint, a team plans their work against the goals of the project over the course of the next two weeks. Once that sprint is over, the accomplishments and developments from it help to create the plan for the next sprint.

A Gantt chart can show how changing one task has the potential to impact the plan or the product roadmap. For agile teams, this is essential since stakeholder feedback is a large part of the methodology.

Gantt charts remain an important project management tool throughout various industries. At the end of the second decade of the 21st century, the Project Management Institute concluded that a mere 11 percent of organizations were fully agile. Most organizations employ waterfall project management methodologies (usually at higher management level) in addition to agile methodology. This is called a hybrid approach. If you happen to think in ’dates and deadlines’ then you’re probably among those that need timeline-based Gantt charts.

Jira Software comes with two different roadmapping features, each with a slightly different focus. Jira Roadmaps is designed to track work assigned to a single team while Advanced Roadmaps is designed for larger, cross-organization project planning.