EWMA Chart

This node outputs SPC EWMA Chart and performs control tests.

Type

SPC-Chart

Class

fire.nodes.graph.NodeSpcEWMAChart

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
weight	Weight
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 EWMA (Exponentially Weighted Moving Average) chart is a control chart in Statistical Process Control (SPC) used to monitor process performance by giving more weight to recent data points. Unlike traditional control charts that treat all data equally, the EWMA chart emphasizes the latest observations, making it highly sensitive to small shifts in the process mean. This makes it ideal for detecting gradual trends or drifts in the process. The EWMA chart is particularly useful in processes where maintaining tight control over small variations is critical, such as in continuous manufacturing or quality-sensitive industries.