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Control Charts

# Control Charts - Control Charts for Attributes An Example...

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1 HOMETOWN BANK Hometown Bank Control Charts for Attributes: An Example

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2 Example 7.3 Hometown Bank UCL p = p + z σ p LCL p = p - z σ p σ p = p (1 - p ) / n Wrong Number Number 1 15 2 12 3 19 4 2 5 19 6 4 7 24 8 7 9 10 10 17 11 15 12 3 Total 147 Total defectives Total observations p = n = 2500 Control Charts for Attributes
3 Hometown Bank UCL p = p + z σ p LCL p = p - z σ p σ p = p (1 - p ) / n Wrong Number Account Number 2 12 3 19 4 2 5 19 6 4 7 24 8 7 9 10 10 17 11 15 12 3 Total 147 147 12(2500) p = n = 2500 Control Charts

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4 Hometown Bank UCL p = p + z σ p LCL p = p - z σ p σ p = p (1 - p ) / n Wrong Number Account Number 2 12 3 19 4 2 5 19 6 4 7 24 8 7 9 10 10 17 11 15 12 3 Total 147 p = 0.0049 n = 2500 Control Charts for Attributes
5 Hometown Bank UCL p = p + z σ p LCL p = p - z σ p σ p = p (1 - p ) / n Wrong Proportion Number Account Number Defective 0.006 2 12 0.0048 3 19 0.0076 4 2 0.0008 5 19 0.0076 6 4 0.0016 7 24 0.0096 8 7 0.0028 9 10 0.004 10 17 0.0068 11 15 0.006 12 3 0.0012 Total 147 p = 0.0049 n = 2500 Control Charts for Attributes

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6 UCL p = p + z σ p LCL p = p z σ p σ p = p (1 – p ) / n n = 2500 p = 0.0049 Control Charts for Hometown Bank

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