Reading the interactive Gantt
Open a project and choose Timeline. Every task with both a start and a due date is a bar; a task that is done is drawn as done, a task on the critical path is marked as such, and a thin line under the bar shows its baseline once one has been set with Set baseline. Milestones are diamonds on their dates, dependencies are arrows from a task to the ones that wait for it, non-working days on your working calendar are shaded, and a Today line marks where you are. Day, Week and Month change the zoom, and the Today button scrolls back to the present.
Hovering over a bar shows its dates and length, assignee, estimate and slack and, when there is a baseline, how many days late or early it is against it. Below the chart a Table view lists the same tasks with start, due, assignee and whether they are on the critical path, which is the accessible way to read the plan and the quickest way to check exact dates. Tasks without both dates are listed under Unscheduled rather than guessed onto the chart, and a very large project shows the first 600 tasks by start date and says so.
In practice: a Nairobi construction firm’s site office opens the timeline of a 14-week fit-out every Monday. On Week zoom the critical path runs through electrical first fix and plastering; the baseline lines show plastering already four days behind the plan agreed at kickoff. Three snag tasks have a due date but no start, so they sit under Unscheduled; the site manager gives them start dates so they appear on the chart and in the critical-path calculation.
Key takeaways
- Bars need a start and a due date; others are listed under Unscheduled.
- Baselines, milestones, dependency arrows, the critical path, shaded non-working days and a Today line are drawn on the chart.
- Day, Week and Month zoom; a Table view below lists the same tasks and dates.
- Large projects show the first 600 tasks by start date.