Process Control Charts

process-control-chart is npm package which provides statistical methods to solve p-chart, np-chart, c-chart, u-chart in order to study how the process changes over time.

Getting Started

• Live Demo
• Example

Install process-control-charts package

npm install process-control-charts

or

yarn add process-control-charts

Example

// index.js
let { pChart } = require('process-control-charts');

let data = [12,15,8, 10, 4, 7, 16, 9, 14, 10, 5, 6, 17, 12, 22 ,8,10, 5 , 13, 11, 20, 18, 24, 15, 9, 12, 7, 13, 9, 6];
let details = pChart(data, 50);
console.log(details);

/* 
x --> Sample number
y --> Sample fraction nonconforming
*/

Run

npm start

Output

{
  lcl: 0,
  cl: 0.074,
  ucl: 0.1850599837925434,
  samplesOutOfControl: 0,
  sampleData: [
    { x: 1, y: 0.04 },  { x: 2, y: 0.06 },
    { x: 3, y: 0.16 },  { x: 4, y: 0.02 },
    { x: 5, y: 0.02 },  { x: 6, y: 0.08 },
    { x: 7, y: 0.02 },  { x: 8, y: 0.08 },
    { x: 9, y: 0.1 },   { x: 10, y: 0.02 },
    { x: 11, y: 0.16 }, { x: 12, y: 0.04 },
    { x: 13, y: 0.08 }, { x: 14, y: 0.06 },
    { x: 15, y: 0.08 }, { x: 16, y: 0.02 },
    { x: 17, y: 0.16 }, { x: 18, y: 0.06 },
    { x: 19, y: 0.14 }, { x: 20, y: 0.08 }
  ],
  lclPlot: [
    { x: 1, y: 0 },  { x: 2, y: 0 },
    { x: 3, y: 0 },  { x: 4, y: 0 },
    { x: 5, y: 0 },  { x: 6, y: 0 },
    { x: 7, y: 0 },  { x: 8, y: 0 },
    { x: 9, y: 0 },  { x: 10, y: 0 },
    { x: 11, y: 0 }, { x: 12, y: 0 },
    { x: 13, y: 0 }, { x: 14, y: 0 },
    { x: 15, y: 0 }, { x: 16, y: 0 },
    { x: 17, y: 0 }, { x: 18, y: 0 },
    { x: 19, y: 0 }, { x: 20, y: 0 }
  ],
  clPlot: [
    { x: 1, y: 0.074 },  { x: 2, y: 0.074 },
    { x: 3, y: 0.074 },  { x: 4, y: 0.074 },
    { x: 5, y: 0.074 },  { x: 6, y: 0.074 },
    { x: 7, y: 0.074 },  { x: 8, y: 0.074 },
    { x: 9, y: 0.074 },  { x: 10, y: 0.074 },
    { x: 11, y: 0.074 }, { x: 12, y: 0.074 },
    { x: 13, y: 0.074 }, { x: 14, y: 0.074 },
    { x: 15, y: 0.074 }, { x: 16, y: 0.074 },
    { x: 17, y: 0.074 }, { x: 18, y: 0.074 },
    { x: 19, y: 0.074 }, { x: 20, y: 0.074 }
  ],
  uclPlot: [
    { x: 1, y: 0.1850599837925434 },
    { x: 2, y: 0.1850599837925434 },
    { x: 3, y: 0.1850599837925434 },
    { x: 4, y: 0.1850599837925434 },
    { x: 5, y: 0.1850599837925434 },
    { x: 6, y: 0.1850599837925434 },
    { x: 7, y: 0.1850599837925434 },
    { x: 8, y: 0.1850599837925434 },
    { x: 9, y: 0.1850599837925434 },
    { x: 10, y: 0.1850599837925434 },
    { x: 11, y: 0.1850599837925434 },
    { x: 12, y: 0.1850599837925434 },
    { x: 13, y: 0.1850599837925434 },
    { x: 14, y: 0.1850599837925434 },
    { x: 15, y: 0.1850599837925434 },
    { x: 16, y: 0.1850599837925434 },
    { x: 17, y: 0.1850599837925434 },
    { x: 18, y: 0.1850599837925434 },
    { x: 19, y: 0.1850599837925434 },
    { x: 20, y: 0.1850599837925434 }
  ]
}

Methods Available

Method Name	Parameter	Output Type
pChart	( [data], SampleSize )	{ Object }
npChart	( [data], SampleSize )	{ Object }
cChart	( [data])	{ Object }
uChart	( [data], SampleSize )	{ Object }

Help

Raise the issue or problem on this repository.

Authors

• Saurabh Tiwari
• Rashid Makki

Example

• Process Control Charts Example