Question

In: Operations Management

As part of an insurance company’s training program, participants learn how to conduct an analysis of...

As part of an insurance company’s training program, participants learn how to conduct an analysis of clients’ insurability. The goal is to have participants achieve a time in the range of 30 to 47 minutes. Test results for three participants were: Armand, a mean of 38.0 minutes and a standard deviation of 3.0 minutes; Jerry, a mean of 35.0 minutes and a standard deviation of 2.0 minutes; and Melissa, a mean of 38.5 minutes and a standard deviation of 1.8 minutes.

a.Which of the participants would you judge to be capable? (Do not round intermediate calculations. Round your answers to 2 decimal places.)
  

Participants Cpk Cp Capable ?
Armand (Click to select)  No  Yes
Jerry (Click to select)  Yes  No
Melissa (Click to select)  No  Yes


b.
Can the value of the Cpk exceed the value of Cp for a given participant?

  • Yes

  • No

Solutions

Expert Solution

Cp=(USL-LSL)/6*Sigma if mean is (30+47)/2 =38.5

Cpk= Min( USL-mean/ 3*sigma, mean-LSL/ 3*sigma)

Armand= Cpk =min(47-38/ 3*3, 38-30/3*3) = 8/9= .89 not capable

Jerry =Cpk =min(47-35/ 3*2, 35-30/3*2) = 5/6 =.82 not capable

Melissa = Cp =(47-30)/ 6*1.8=1.57 capable

b. No Cpk can not exceed the Cp due higher deviation (check formula )


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