# Gantt Chart

> A dashboard item that lists tasks with their start and finish dates and draws them as bars on a day scale, with child tasks under their parent.

Source: https://proxus.io/docs/analyze/dashboard-items/gantt

The **Gantt Chart**  shows a plan: a list of tasks on the left and a bar
for each task on a day scale on the right. Child tasks sit under their parent, so a larger job reads as its steps. Use
it for planned work with dates: a maintenance shutdown, a changeover plan, a project on the shop floor.

*Screenshot: The Gantt Chart with a maintenance plan for this week: the parent task Line 2 shutdown with its child tasks Drain and clean, Replace filler valves, Calibrate checkweigher and Test run, each with its dates and a bar on the day scale*

1. **Task list.** One row per task with its subject, start date and end date. A parent task can be collapsed to hide
   its child tasks.
2. **Parent task.** A task that other tasks name as their parent. Its bar spans the work under it.
3. **Task bar.** One task, from its start date to its finish date, on a scale of days.

Select a task to filter the other items of the dashboard by that task.

## Data fields

Give every task a unique **ID** and its title in **Text**. **Parent ID** is the **ID** of the task it belongs under;
top-level tasks take `-1`. **Start Date** and **Finish Date** must be dates: bind date-time fields and group them by
an exact date, not by year or month alone. If either one is not a date, the item shows the warning "Gantt: 'Start Date'
or 'Finish Date' is not a Date object." and draws no tasks.

## Settings

The task list is 500 pixels wide and the scale is in days.

## Related

- [Proxus dashboard items](https://proxus.io/docs/analyze/dashboard-items)
- [Use and build dashboards](https://proxus.io/docs/analyze/dashboards)