To monitor the quality of pepperoni pizzas, a quality control manager collects r

Question

To monitor the quality of pepperoni pizzas, a quality control manager collects random samples of pizzas and evaluates them. The process mean and standard deviation for the weight and diameter of pizzas are not known. Which of the following is a correct matching between the type of data collected and the choice of control chart used?

I. weighed the sampled pizzas and constructed a c-chart

II. rated the appearance of sampled pizzas as acceptable or unacceptable and then constructed a mean chart

III. measured the diameter of the sampled pizzas and constructed a range chart

IV. counted the number of pepperonis per sampled pizza and constructed a mean chart

Select one:

a. only III

b. III and IV

c. only IV

d. I and IV

e. none of the listed

Explanation / Answer

Answer is (d) I and IV

As Control charts are used to routinely monitor quality, the chart contains a center line that represents the mean value for the in-control process i.e weight of Pizza here and,

counted the number of pepperonis per sampled pizza and constructed a mean chart as number of pepperonis also impact the quality and wieght of Pizza's

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