Ron Sedlock

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?
Ron Sedlock Education Chair rsedlock_at_msn.com
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Data

• What is the central tendency?
• What is the dispersion?
• What is the shape?

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The Standard Deviation
(x-µ)
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The Normal (Gaussian) Curve
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River Crossing Problem
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Central Limit Theorem
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Shape Effecting the Standard Deviation
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Shape Effecting the Standard Deviation
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Total Variance (?2T)

Process (?2T)
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lt10 error Acceptable 10-30 - May be
acceptable based on situation. gt30 error -
Unacceptable
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Process Performance Index (present performance)
Process Capability Index (potential capability)
Cp
Ppk
Cpk
Ppu
Cpl
Ppl
Min Cpu or Cpl
Ppk
Min Cpu or Cpl
Cpk
Cpm
Ppm
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Coming Attractions

• Next Month ---
• Quality Function Deployment (QFD)
• The Voice of the Customer