Benefits of using the mega statistical process control

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Eindhoven ? EURANDOM

November 2005

Benefits of Using the MEGA Statistical Process Control

Santiago Vidal Puig

Multivariate Statistical Engineering Group; Dept. Applied Statistics, O.R. & Quality; Technical University of Valencia (SPAIN)

EURANDOM 2005

Eindhoven ? EURANDOM

November 2005

Statistical Process Control: Univariate Charts USPC, MSPC and MegaSPC.

Strategies for fault diagnosis during the monitoring of a multivariate process.

Multivariate Statistical Engineering Group; Dept. Applied Statistics, O.R. & Quality; Technical University of Valencia (SPAIN)

EURANDOM 2005

Eindhoven ? EURANDOM

November 2005

Statistical Process Control:

Univariate Charts SPC, MSPC and MegaSPC

Multivariate Statistical Engineering Group; Dept. Applied Statistics, O.R. & Quality; Technical University of Valencia (SPAIN)

EURANDOM 2005

Control in a nonstationary world

The stable stationary state is the unnatural one

"If left to themselves machines do not stay adjusted, components wear out and managers and operators miscommunicate and change jobs"

Box G. and Luce?o A.

Left to itself the entropy of any system can never decrease

The second law of thermodynamics

Process Monitoring Process Adjusting

Multivariate Statistical Engineering Group; Dept. Applied Statistics, O.R. & Quality; Technical University of Valencia (SPAIN)

EURANDOM 2005

Statistical Process Control

Establish a permanent and intelligent information system over the process evolution :

Detect the anomalies at an early stage (special causes)

Help to identify the causes of the anomalies

Eliminate the anomalies and prevent their reappearance (or on the contrary incorporate them to the process if they improve its performance)

Multivariate Statistical Engineering Group; Dept. Applied Statistics, O.R. & Quality; Technical University of Valencia (SPAIN)

EURANDOM 2005

Statistical Process Control

In industrial processes where process and quality variables are measured exist several strategies for statistical process control

Univariate Charts: USPC

Multivariate Charts: MSPC

Megavariate Charts: Mega SPC

Multivariate Statistical Engineering Group; Dept. Applied Statistics, O.R. & Quality; Technical University of Valencia (SPAIN)

EURANDOM 2005

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