Chapter 9 - Chapter 9 KVANLI PAVUR KEELING Quality...

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Click to edit Master subtitle style 3/13/11 Chapter 9 Quality Improvement KVANLI PAVUR KEELING
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3/13/11 Chapter Objectives At the completion of this chapter, you should be able to: ∙ Know what is Six Sigma ∙ Understand the reason for, and the construction of, flowcharts and cause-and-effect diagrams
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3/13/11 Chapter Objectives - Continued At the completion of this chapter, you should be able to: ∙ Construct and R charts ∙ Detect nonrandom patterns in charts ∙ Construct p charts and c charts ∙ Determine capability ratios Cp, Cpk, and Cpm X X
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3/13/11 Quality The term quality means slightly different things to different people. We will define a quality product or service to be one that meets or surpasses the needs and expectations of the customer ; that is quality means
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3/13/11 A First Look at Quality Improvement What if you could be 99% mistake-free in your job? How about 99.9%? In many job areas, that is just good enough to get you a place in the unemployment line If 99.9% was good enough,
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3/13/11 A First Look at Quality Improvement 22,000 checks per hour would be deducted from the wrong bank accounts Two million documents would be lost by the IRS this year 12 babies born today would be given to the wrong parents 18,322 pieces of mail would be
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3/13/11 Six Sigma Six Sigma is a very structured approach to solving problems It uses sound statistical methods and hard facts Six Sigma originated at Motorola in the mid 1980’s The primary goal of Six Sigma is to
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3/13/11 Six Sigma
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3/13/11 Six Sigma Sigma level DPMO Percent defective Percenta ge yield Short- term Cpk Long- term Cpk 1 691,462 69% 31% 0.33 –0.17 2 308,538 31% 69% 0.67 0.17 3 66,807 6.7% 93.3% 1.00 0.5 4 6,210 0.62% 99.38% 1.33 0.83 5 233 0.023% 99.977% 1.67 1.17 6 3.4 0.00034% 99.99966 % 2.00 1.5 7 0.019 0.000001 9% 99.99999 81% 2.33 1.83
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3/13/11 Implementing Six Sigma Implementation of Six Sigma involves a five-phase improvement cycle, referred to as DMAIC (pronounced “duh-MAY-ick”) DMAIC is an acronym for the following five activities: D efine the problem and requirements M easure key internal processes and
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3/13/11 Summary of Six Sigma Six Sigma provides companies with a methodology and philosophy for minimizing mistakes and maximizing value The quality improvement philosophy is that all business organizations and individuals have room to improve When used properly, the Six Sigma approach can dramatically reduce
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3/13/11 Some Key Definitions Variation : This is a key component of product quality and consists of two types: ∙ chance variation (the process is stable) ∙ variation due to an assignable cause (the process has become unstable)
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3/13/11 Some Key Definitions Control Chart : A statistical tool used to monitor a process to determine if the process is in control (stable) or out of control (unstable) Statistical Process Control (SPC): The application of statistical quality control methods to measuring and analyzing the variation found in
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3/13/11 Process Variation Variation always exists because, from day to day, you don’t have the same ∙ people ∙ materials ∙ machines ∙ weather conditions, etc.
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This note was uploaded on 03/12/2011 for the course DSCI 2710 taught by Professor Hossain during the Summer '08 term at North Texas.

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Chapter 9 - Chapter 9 KVANLI PAVUR KEELING Quality...

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