The 12-month Gantt chart is a timeline that shows the different tasks and their start and end dates for a project. A Gantt chart is a timeline that shows the different tasks and their start and end dates for a project. It is usually used to organize projects that are ongoing over time, such as construction projects, product design, or software development. The task list will typically be divided into phases of work, which may be further subdivided into sub-phases. The Gantt chart can also be used in qualitative research to study how people work together on a task or problem.