I-MR Chart

This node outputs SPC IMR Chart and performs control tests.

Type

SPC-Chart

Class

fire.nodes.graph.NodeSpcIMRChart

Fields

Name	Title	Description
title	Title
titleColor	Title Color
description	Description
descriptionColor	Description Color
measurements	Measurements Columns	Measurements column names
identifier	Identifier Columns	Identifier column names
test1	point beyond the control limits
test2	k or more consecutive points are one side of the centerline
test3	k or more consecutive points are increasing or decreasing
test4	k consecutive points alternate up or down
test5	k out of k+1 consecutive points are one side of the centerline
test6	k out of n consecutive points are one side of the centerline

Details

The I-MR (Individual-Moving Range) chart in Statistical Process Control (SPC) monitors process stability using individual data points. The “I” chart tracks individual measurements over time, while the “MR” chart shows the moving range between consecutive measurements to detect variability. It’s ideal when sample sizes are small or when it’s difficult to collect multiple measurements. By identifying shifts, trends, or outliers, the I-MR chart helps ensure that a process stays within control limits and operates consistently, making it a key tool for maintaining quality control in manufacturing and other processes.