or Up your Ppk

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Process CapabilityMeasurements
Back to Basics

• or Up your Ppk

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The Normal (Gaussian) Curve
-3? -2? -1? ?
1? 2? 3?
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µ
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(No Transcript)
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(No Transcript)
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Process Capability Index (potential capability)
Cp

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Cp 1
Cp gt 1
Cp lt 1
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USL
LSL
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zUSL
zLSL
Cpk
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(No Transcript)
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Motorola Six Sigma Process Capability
?1.5?
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Taguchi Loss Function
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Process Capability Index (potential capability)
Cp

Cpk (and z-scores)
Cpl
Min Cpu or Cpl
Cpk
Cpm
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Process Capability Index (potential capability)
Process Performance Index (present performance)
Cp

Cpk (and z-scores)
Cpl
Min Cpu or Cpl
Cpk
Cpm
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Summary

• Three ways to increase process capability and
  process performance index numbers
• Set the process closer target.
• Reduce the standard deviation.
• Validate of the specification limits.

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Coming Attractions

• Next Month ---
• Process-Based
• Auditing