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ASQ Presentation 4/15/08 Andy Lauber SPC Statistical Process Control.

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Presentation on theme: "ASQ Presentation 4/15/08 Andy Lauber SPC Statistical Process Control."— Presentation transcript:

1 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net SPC Statistical Process Control

2 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Continual Improvement ISO Six Sigma Baldrige Criteria for Performance Excellence TQM Profit

3 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net VARIATION

4 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net VARIATION Changes in the value of a measured characteristic

5 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Types of VARIATION Natural Variation or Common Causes Unnatural variation or Special Causes

6 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Distribution from bead board

7 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Distribution from bead board with 3 standard deviations

8 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Distribution in groups of 5 samples

9 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Compare single to ave of 5

10 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net CONTROL CHART A graphical method of evaluating whether a process is in a state of statistical control

11 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Distribution from bead board with 3 standard deviations first 30 points

12 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Control chart sample of 5

13 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Comparison

14 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net XBAR & R Control chart

15 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net XBAR & R CONTROL CHART A graphical method of evaluating whether a process is in a state of statistical control Based on a normal distribution

16 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Individual rolls of a die – Flat distribution

17 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Flat distribution sample size of 2

18 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Flat distribution sample size of 3

19 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Flat distribution sample size of 4

20 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net CONTROL CHART Variables Data Attribute Data

21 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Attribute Control Chart

22 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net How to implement and use SPC Evaluate current process Determine if process is in control –Common cause variation –Special cause variation Involve people Only chart what you can handle Immediate action to out of control conditions

23 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Capacitor distribution

24 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Distribution +- 20% Limits

25 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Distribution with +- 10% Limits

26 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Distribution with +- 5% Limits

27 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Control chart

28 ASQ Presentation 4/15/08 Andy Lauber alauber@att.net Attribute Control Chart

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