Running with a standard deviation

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1. For 2 process steps, each with 5% fraction defective, what is our final Process Yield?

2. For 4 process steps, each with a yield of 25%, what is our final Process Yield?

3. For a 95% yield at each step what is the ppm (Parts per Million) defective?

4. For a 99.999% yield at each step what is the ppm (Parts per Million) defective?

5. A cable manufacturer produces micro USB cables. The size of the connector is allowed to vary between 4.998mm and 5.003mm. The process is currently running with a standard deviation of 0.001mm. What is the value of CP for this process?

6. A food producer is bottling vinegar. The amount of acid in this vinegar is allowed to be between 12mg± 1mg. Currently the process is running with a standard deviation of 1mg. What is the CP for this process?

7. The CP value of a process is 1.00. What is the possible range the CPK values can take?

8. To reach a CP of 2.00 for a process, how many standard deviations have to fit between the LSL and USL?

9. The LSL is given by 15mm for a process. The standard deviation is 1mm. How far above the LSL can you center the process to still reach a CPK value of at least 1.00?

Reference no: EM131700035

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