Planning & Scheduling
PERT Chart
MyPMP
QMS Template
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🗺️ Planning & Scheduling
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About the PERT Chart template
A PERT (Program Evaluation and Review Technique) chart is a network diagram that maps project activities as a sequence of nodes and dependency arrows, using three time estimates—optimistic, most likely, and pessimistic—to model uncertainty in each task's duration. It helps you calculate a weighted expected time, identify the critical path, and forecast realistic completion dates when durations are hard to pin down. This makes it valuable for planning novel or high-risk work where a single fixed estimate would be misleading.
It's part of My QMS, MyPMP's Quality Management System: fill it in online, personalize it with your name and logo, then export a clean, branded PDF. Your work auto-saves in your browser.
When to use a PERT Chart
- ▸Scheduling projects with uncertain or unprecedented task durations, such as R&D or new product development
- ▸Estimating a realistic completion date and probability range rather than a single deadline
- ▸Identifying the critical path and float across parallel workstreams
- ▸Communicating dependencies and sequencing to stakeholders early in planning
What a good PERT Chart includes
- ✓Activities or tasks represented as nodes or arrows with unique IDs
- ✓Predecessor and successor links defining dependencies
- ✓Three estimates per task: optimistic (O), most likely (M), pessimistic (P)
- ✓Expected time calculated as (O + 4M + P) / 6, plus variance and standard deviation
- ✓Earliest/latest start and finish times to derive slack and the critical path
- ✓Milestones and the overall expected project duration
What's inside this template
The interactive form above gives you:
Purpose / summaryScope / detailsApproach / bodyDeliverables / outcomesNotes & sign-off
Tips & common mistakes
- 💡Base your three estimates on evidence or expert input, not gut rounding—inflated pessimistic values distort the whole schedule
- 💡Recalculate the critical path whenever dependencies or estimates change; it can shift as the project progresses
- 💡Don't confuse PERT with a Gantt chart—PERT models logic and uncertainty, while a Gantt shows the timeline; use them together
How it works
- 1. Fill it in — type directly into the fields, tables and sections above.
- 2. Brand it — add your organization name and logo with the Branding button.
- 3. Export — print to PDF, or become a member to white-label and sync across devices.
FAQ
How is expected time calculated in a PERT chart?＋
Expected time uses the weighted formula (Optimistic + 4 × Most Likely + Pessimistic) / 6, giving greater weight to the most likely estimate while accounting for best- and worst-case bounds.
What is the difference between PERT and CPM?＋
CPM uses a single deterministic duration per activity and focuses on cost-time trade-offs, while PERT uses three probabilistic estimates to handle uncertainty, making it better suited to projects with unpredictable task durations.
How do you find the critical path on a PERT chart?＋
Perform a forward pass to calculate earliest start and finish times, then a backward pass for latest times; the critical path is the sequence of activities with zero slack, which determines the shortest possible project duration.
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