IMR-S Chart

This node outputs SPC IMR-S Chart and performs control tests.

Type

SPC-Chart

Class

fire.nodes.graph.NodeSpcIMRSChart

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-S chart in Statistical Process Control (SPC) is a control chart used to monitor both individual measurements and the variability within subgroups. The “I” chart tracks individual data points over time, the “MR” chart monitors the moving range between consecutive measurements, and the “S” chart measures the standard deviation within subgroups. This chart is ideal for processes with small sample sizes and helps detect shifts in both the process mean and variability. By identifying trends, shifts, or outliers, the I-MR-S chart ensures that a process remains stable and operates within control limits for consistent quality.