#### TarKEpa

##### Registered

Hi All;

Kindly I need to make sure from my calculation in the attached sheet

1. I'm calculating the UCL and LCL for Product Overall Yield (Pharmaceutical), I used I-MR chart,

2. then, calculate Cp and Cpk. (This is before Improvement)

============================================================

1. I got rid of (Out-of-Specs) and (Out-of-Control) points,

2. then, calculate again new UCL and LCL using the old UCL and LCL as a new USL and LSL,

3. then, calculate Cp and Cpk again (after Improvement)

My Questions:

1. Did I use the correct control chart?

2. Am I right in my steps to calculate UCL and LCL before and after improvement?

3. Am I right in calculating Cp and Cpk before and after improvement? and If, Why Cp and Cpk before improvement is higher than after?????

Kindly I need to make sure from my calculation in the attached sheet

1. I'm calculating the UCL and LCL for Product Overall Yield (Pharmaceutical), I used I-MR chart,

2. then, calculate Cp and Cpk. (This is before Improvement)

============================================================

1. I got rid of (Out-of-Specs) and (Out-of-Control) points,

2. then, calculate again new UCL and LCL using the old UCL and LCL as a new USL and LSL,

3. then, calculate Cp and Cpk again (after Improvement)

My Questions:

1. Did I use the correct control chart?

2. Am I right in my steps to calculate UCL and LCL before and after improvement?

3. Am I right in calculating Cp and Cpk before and after improvement? and If, Why Cp and Cpk before improvement is higher than after?????

#### Attachments

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