Tools

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Concepts

SPC defined

Control Chart Properties

Rational Subgroups

Distributions

Defining Control Limits

Short Run Techniques

Interpretation & Calculations

Attributes Charts

Pareto Charts

X-Bar / Range Charts

X-Bar / Sigma Charts

Individual-X Charts

Moving Average Charts

CuSum Charts

EWMA Charts

Multivariate Control Charts

Histograms, Process Capability

Autocorrelation Charts

Measurement Systems Analysis

Applications

Getting Started with SPC

Key Success Factors for the Implementation of SPC

How to Study Process Capability

Multiple Steam Processes

Analysis of Batch Processes

SPC to Improve Quality, Reduce Cost

Struggling with Independence

SPC Analysis of MLB Home Runs

Use Of SPC To Detect Process Manipulation

Using Data Mining and Knowledge Discovery With SPC

Index

PCL

Process Center Line

When a Normal Distribution is assumed for the control chart statistic the centerline for the Individual-X chart is the midpoint between the calculated (or pre-defined, in that case) Upper Control Limit and Lower Control Limit. See Individual-X chart calculations.

When a non-normal distribution is assumed for the control chart statistic the centerline for the Individual-X chart is the median of the fitted distribution.


Learn more about the SPC principles and tools for process improvement in Statistical Process Control Demystified (2011, McGraw-Hill) by Paul Keller, in his online SPC Concepts short course (only $39), or his online SPC certification course ($350) or online Green Belt certification course ($499).