Pareto charts combine a descending bar chart with a cumulative line chart to apply the Pareto principle (80/20 rule). By sorting causes from most to least frequent and overlaying a cumulative percentage line, they help teams quickly identify which few factors are responsible for the majority of a problem.

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cause	count	cumulative
Surface Scratch	342	38.2
Dimensional Error	218	62.6
Wrong Material	142	78.4
Assembly Fault	88	88.2
Label Error	54	94.2
Packaging Defect	32	97.8
Other	20	100

{
  "title": {
    "text": "Manufacturing Defects — Pareto Analysis"
  },
  "data": [
    {
      "cause": "Surface Scratch",
      "count": 342,
      "cumulative": 38.2
    },
    {
      "cause": "Dimensional Error",
      "count": 218,
      "cumulative": 62.6
    },
    {
      "cause": "Wrong Material",
      "count": 142,
      "cumulative": 78.4
    },
    {
      "cause": "Assembly Fault",
      "count": 88,
      "cumulative": 88.2
    },
    {
      "cause": "Label Error",
      "count": 54,
      "cumulative": 94.2
    },
    {
      "cause": "Packaging Defect",
      "count": 32,
      "cumulative": 97.8
    },
    {
      "cause": "Other",
      "count": 20,
      "cumulative": 100
    }
  ],
  "series": [
    {
      "type": "bar",
      "xKey": "cause",
      "yKey": "count",
      "fill": "#6366f1",
      "fillOpacity": 0.85
    },
    {
      "type": "line",
      "xKey": "cause",
      "yKey": "cumulative",
      "stroke": "#f43f5e",
      "strokeWidth": 2,
      "marker": {
        "enabled": true
      }
    }
  ],
  "axes": [
    {
      "position": "bottom",
      "title": {
        "text": "Defect Cause"
      }
    },
    {
      "position": "left",
      "title": {
        "text": "Count"
      }
    },
    {
      "position": "right",
      "title": {
        "text": "Cumulative %"
      }
    }
  ],
  "showYAxisRight": true,
  "legend": {
    "enabled": true,
    "position": "bottom"
  }
}

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Manufacturing defect causes sorted by frequency, with a cumulative percentage line showing the 80/20 rule.

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