Introduction to the Introduction to the Use of Use of Classic Classic Quality Tools Quality Tools Presented by Dr. Joan Burtner Presented by Dr. Joan Burtner Certified Quality Engineer Certified Quality Engineer Associate Professor of Associate Professor of Industrial Engineering and Industrial Industrial Engineering and Industrial Management Management
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Introduction to the Use of Classic Quality Tools Presented by Dr. Joan Burtner Certified Quality Engineer Associate Professor of Industrial Engineering.
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Introduction to the Introduction to the Use of Use of ClassicClassic Quality Quality
ToolsTools
Presented by Dr. Joan BurtnerPresented by Dr. Joan Burtner
Used to show the many Used to show the many different causes that different causes that may contribute to a may contribute to a problem (effect)problem (effect)
Causes are frequently Causes are frequently generated through generated through brainstorming sessionsbrainstorming sessions
ETM 591 ISE 427 Fall 201ETM 591 ISE 427 Fall 20100
Dr. Joan Burtner, Associate Professor of Industrial EngineeringDr. Joan Burtner, Associate Professor of Industrial Engineering Slide Slide 66
ETM 591 ISE 427 Fall 201ETM 591 ISE 427 Fall 20100
Dr. Joan Burtner, Associate Professor of Industrial EngineeringDr. Joan Burtner, Associate Professor of Industrial Engineering Slide Slide 77
Classic Quality Tool 4:Classic Quality Tool 4:Pareto ChartPareto Chart Pareto (an 1800s Italian economist) Pareto (an 1800s Italian economist)
noted that 80 percent of the wealth noted that 80 percent of the wealth in Italy was held by 20 percent of the in Italy was held by 20 percent of the populationpopulation
Juran (20Juran (20thth century) 80% of the century) 80% of the variation in a process is caused by variation in a process is caused by 20% of the variables20% of the variables 20% - vital few 20% - vital few 80% - trivial many or useful many80% - trivial many or useful many
ETM 591 ISE 427 Fall 201ETM 591 ISE 427 Fall 20100
Dr. Joan Burtner, Associate Professor of Industrial EngineeringDr. Joan Burtner, Associate Professor of Industrial Engineering Slide Slide 88
Classic Quality Tool 4:Classic Quality Tool 4:Pareto Chart (cont.)Pareto Chart (cont.) Causes are frequently Causes are frequently
documented in a documented in a check list which is check list which is used to generate a used to generate a Pareto chartPareto chart
Managers use Pareto Managers use Pareto charts to help focus or charts to help focus or prioritize process prioritize process improvement effortsimprovement efforts
Compare to a Compare to a histogram (X-axis)histogram (X-axis)
ETM 591 ISE 427 Fall 201ETM 591 ISE 427 Fall 20100
Dr. Joan Burtner, Associate Professor of Industrial EngineeringDr. Joan Burtner, Associate Professor of Industrial Engineering Slide Slide 99
Shape of the bars is Shape of the bars is only a rough indication only a rough indication of the distributionof the distribution
Histogram of W eight ( lbs)
0
2
4
6
8
10
12
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10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0
Cell U pper BoundF
re
qu
en
cy
ETM 591 ISE 427 Fall 201ETM 591 ISE 427 Fall 20100
Dr. Joan Burtner, Associate Professor of Industrial EngineeringDr. Joan Burtner, Associate Professor of Industrial Engineering Slide Slide 1111
Classic Quality Tool 7:Classic Quality Tool 7:Scatter DiagramScatter Diagram Also known as an X-Y Also known as an X-Y
graphgraph ““Shows whether or not Shows whether or not
there is a correlation there is a correlation between two variables”between two variables”
Caution: A statistical Caution: A statistical correlation does not correlation does not guarantee a direct cause guarantee a direct cause and effectand effect