PERT (Program Evaluation and Review Technique) charts are network diagrams that model project tasks as nodes connected by directional edges representing dependencies. Each task has three duration estimates â€” optimistic, most likely, and pessimistic â€” which are combined using the PERT beta distribution formula to compute an expected duration. The critical path (longest path through the network) is highlighted to show which tasks determine the minimum project duration.

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label
Project Kickoff
Requirements
System Design
Database Schema
Backend API
Frontend Dev
Integration Testing
User Acceptance Test
Deployment

{
  "data": [
    {
      "id": "A",
      "label": "Project Kickoff",
      "dependsOn": [],
      "optimistic": 1,
      "mostLikely": 1,
      "pessimistic": 2
    },
    {
      "id": "B",
      "label": "Requirements",
      "dependsOn": [
        "A"
      ],
      "optimistic": 3,
      "mostLikely": 5,
      "pessimistic": 8
    },
    {
      "id": "C",
      "label": "System Design",
      "dependsOn": [
        "B"
      ],
      "optimistic": 4,
      "mostLikely": 6,
      "pessimistic": 10
    },
    {
      "id": "D",
      "label": "Database Schema",
      "dependsOn": [
        "B"
      ],
      "optimistic": 2,
      "mostLikely": 3,
      "pessimistic": 5
    },
    {
      "id": "E",
      "label": "Backend API",
      "dependsOn": [
        "C",
        "D"
      ],
      "optimistic": 6,
      "mostLikely": 9,
      "pessimistic": 14
    },
    {
      "id": "F",
      "label": "Frontend Dev",
      "dependsOn": [
        "C"
      ],
      "optimistic": 5,
      "mostLikely": 8,
      "pessimistic": 12
    },
    {
      "id": "G",
      "label": "Integration Testing",
      "dependsOn": [
        "E",
        "F"
      ],
      "optimistic": 2,
      "mostLikely": 4,
      "pessimistic": 7
    },
    {
      "id": "H",
      "label": "User Acceptance Test",
      "dependsOn": [
        "G"
      ],
      "optimistic": 2,
      "mostLikely": 3,
      "pessimistic": 5
    },
    {
      "id": "I",
      "label": "Deployment",
      "dependsOn": [
        "H"
      ],
      "optimistic": 1,
      "mostLikely": 2,
      "pessimistic": 3
    }
  ],
  "series": [
    {
      "type": "pert",
      "idKey": "id",
      "labelKey": "label",
      "dependsOnKey": "dependsOn",
      "optimisticKey": "optimistic",
      "pessimisticKey": "pessimistic",
      "mostLikelyKey": "mostLikely"
    }
  ],
  "title": {
    "text": "Software Development PERT Chart"
  }
}

Edit JSON above · auto-previews after 0.9 s

A PERT (Program Evaluation and Review Technique) chart visualizes project tasks as nodes in a directed acyclic graph, with edges showing dependencies and critical path highlighted.

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