Consider an electronic dispenser used for dispensing polyamide coating material in various...

Consider an electronic dispenser used for dispensing polyamide coating material

in various electronic manufacturing processes. One of the requirements of the

dispenser is that it should dispense 1000 mg of coating each time it is operated

(requirement is amount dispensed). The amount dispensed was measured for a

sample of 90 trials. The results are shown in Figure 6.9.

(a) Given the following process capability analysis in Figure 6.9, assuming a normal distribution, and a defect probability of 0.15, what is the desirability score

using the method of expected yields, for the requirement amount dispensed?

(b) The standard deviation for the amount of coating dispensed was designed to

have a target value of 25 with an upper limit of 40. What is the actual standard

deviation? Determine the desirability score using the method of non-mean

responses assuming a linear objective function?

Consider the equation below

(a) Given Z = 75, what nominal value of Y yields a value of 125 000 for X?

(b) Given the standard deviation of Y is 6, and the standard deviation of Z is 3,

what is the bias and standard deviation of X?

(c) Determine the nominal values of Y and Z which would minimize the variation

of X and also achieve the required nominal X value of 125 000.