If you have ever dealt with planning at work, you have certainly heard about the Gantt chart. This popular project management tool helps visually represent tasks and deadlines, providing a clear understanding of processes and dependencies in a project. It is especially important for teamwork.
What is a Gantt Chart?
A Gantt chart is a project planning tool. It is a schedule consisting of two axes — a vertical one with a list of tasks and a horizontal one with deadlines. Each task appears as a rectangle with the responsible person indicated. The Gantt chart also has arrows connecting tasks to demonstrate dependencies between them. Project managers use this tool to manage teams consisting of different specialists and even groups of teams.
The chart was authored and popularized by American engineer Henry Gantt. At the beginning of the 20th century, it was drawn by hand. Today, there are many programs that automate the process.
Why Use This Tool?
A Gantt chart allows you to:
- Forecast project timelines
- Correctly distribute tasks among employees, taking into account each person's workload
- Understand the dependencies between actions of different specialists
- See how changing one task affects the entire project
- Easily find "bottlenecks" and potential problems
- Take timely action and make necessary changes
- Quickly communicate information to all team members
For employees, visualization helps:
- Plan their own work
- Visually see colleagues' progress
The tool is applied across various economic sectors: construction, IT projects, event planning, and educational assignments.
Who Uses a Gantt Chart?
| Role | Purpose |
|---|---|
| Project Manager | Responsible for creating the chart and making changes |
| Project Participants | Must understand the chart and its dependencies |
| Company Leadership | Reviews the chart for a high-level overview of the entire project |
| Clients | Track the progress of the project being done for them |
| Other Stakeholders | Follow the progress and status of the project |
How to Create a Gantt Chart
Simple Method
- Identify specific project tasks
- Assign responsible persons to each task
- Set the duration of each task
- Create a horizontal timeline with the project start and end date
- Create a vertical axis and place tasks on it
- For each task, draw a horizontal bar showing the start and end of task execution on the timeline
- Establish dependencies between tasks. Use arrows or lines to show which tasks must be completed before others begin.
Detailed Method
- Collect initial data — tasks. Tasks are formulated using the Work Breakdown Structure (WBS) tool. Create a change management plan to avoid Scope Creep — uncontrolled expansion of project boundaries that can lead to deadline failures.
- With the team, compile a task execution schedule: determine on which days and within what timeframes each task will most effectively be performed.
- Create dependencies between tasks. Tasks can be parallel and sequential. Know the 4 types of task dependencies: finish-to-start, start-to-finish, start-to-start, and finish-to-finish.
- Identify resources. These include person-hours, materials, and equipment.
- Determine the duration of each task.
- Add all information to a project management program (e.g., Darlean).
The authors of Gantt.com recommend adding so-called buffers — small segments of time and resources as a safety net.
Is a Gantt Chart Always Necessary?
This tool was invented to manage complex projects and plan the work of large teams. That is why it is not always suitable for small or homogeneous teams. In some cases, it is simpler to use a project timeline or a calendar plan.
Main limitations:
- Creating a Gantt chart can take quite a lot of time.
- It does not indicate task priorities, which complicates work when there is a shortage of specialists or time.
- It does not show the amount of resources expended — some tasks may take little time but require comparatively many materials or financial resources.