An SPC study: control, range, capability

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/lattice-grid.min.css">

<script type="module">
  import { defineLatticeGrid } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/modules/webcomponent.esm.js';
  defineLatticeGrid();
</script>

<div id="control" style="height: 220px"></div>
<div style="display: flex; gap: 12px; margin-top: 12px">
  <div id="mr" style="flex: 1; height: 200px"></div>
  <div id="cap" style="flex: 1; height: 200px"></div>
</div>
<lattice-grid row-key="id" style="display: block; height: 320px; margin-top: 12px"></lattice-grid>

<script type="module">
  import { createChart } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/modules/charts.esm.min.js';

  const el = document.querySelector('lattice-grid');
  el.config = {
    columns: [
      { field: 'n', title: '#', type: 'number' },
      // The tolerance is declared once, on the column; every SPC figure reads it.
      { field: 'bore', title: 'Bore', type: 'millimetres', spec: { lower: 9.95, upper: 10.05, target: 10 } },
    ],
  };
  el.rows = rows;  // measured parts, in the order they were made

  // baseline fixes the limits on the first thirty readings, so a later drift
  // breaks a rule rather than widening the limits to absorb it. Every chart
  // reads el.grid, the live grid inside the element.
  createChart({ grid: el.grid, container: '#control', type: 'control',     y: 'bore', baseline: 30, rules: 'nelson' });
  createChart({ grid: el.grid, container: '#mr',      type: 'movingRange', y: 'bore' });
  createChart({ grid: el.grid, container: '#cap',     type: 'capability',  y: 'bore' });

  // The capability index against the declared tolerance, with the rule set applied.
  const c = el.grid.statistics.capability('bore', { rules: 'nelson', baseline: 30 });
  console.log(c.cpk, c.violations);
</script>