How to Plan a Project with a Gantt Chart

A Gantt chart is a bar chart of a project over time: each task is a bar from its start to its end. It shows at a glance what happens when, who's doing it and if the project is on schedule.

Step 1: Break the work into tasks

List tasks of a few days to two weeks each. "Install machines" is too big; "Machine delivery", "Installation", "Trial runs" are better. Group them into phases: planning, design, procurement, execution, handover.

Step 2: Estimate durations honestly

Ask the person doing the work, add buffer for approvals and waiting time, and remember holidays and weekly offs. Most delays come from waiting (for quotes, approvals, deliveries), not from the work itself.

Step 3: Order the tasks

Some tasks can only start after others finish: a PO after vendor quotes, installation after delivery. Set start dates accordingly. Tasks that don't depend on each other can run in parallel.

Step 4: Owners and milestones

Every task needs one owner. Milestones are the moments that matter: scope sign-off, PO issued, machine delivered, go-live. They're what you report to management.

Step 5: Read the chart

• Bars to the left of today's date should be complete
• A bar crossing today should be partly done, roughly in proportion to the time passed
• If a task is 50% through its time but 10% done, it's behind; act now, not at the end date

The weekly review (20 minutes)

1. Update % done for every active task.
2. Look at tasks marked Behind or Overdue: what's blocking, who helps, what's the new date?
3. Check the next two weeks: are materials, people and approvals ready?
4. Share the Gantt with stakeholders.

Common mistakes

• Planning in too much detail for months ahead; detail the next 4 weeks, outline the rest
• No buffer before milestones promised to customers
• Updating the plan only when someone asks

Overall progress

Weight each task's % done by its duration. A 15-day task at 20% counts more than a 2-day task at 100%.

Our Project Tracker with Gantt Chart & Milestones builds a 16-week Gantt with completed work in green, flags tasks behind schedule and lists milestones with their status.