The process standard deviation is mathematically given as
Standard deviation = 0.25
Generally, the equation for is mathematically given as
Process capability ratio,
Cp = [tex]\frac{USL - LSL}{ 6*\sigma}[/tex]
Upper specifications USL= 10 min
Lower specifications LSL= 8 min
Standard deviation as [tex]\sigma[/tex]
Therefore,
Cp = (10-8)/ 6*[tex]\sigma[/tex]
1.33 = (10-8)/ 6*[tex]\sigma[/tex]
[tex]\sigma[/tex] = 0.25
In conclusion, the process standard deviation is
[tex]\sigma[/tex] = 0.25
standard deviation = 0.25
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