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Exam 12: Design For Quality And Product Excellence

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Question 41

True/False

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One minus the failure rate is equal to the mean time to failure.

A) True
B) False

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Question 42

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In mathematical terms,the Taguchi loss function assumes that losses can be approximated by a quadratic function so that larger deviations from target correspond to:

A) decreasing tolerances.
B) larger variances.
C) increasingly larger losses.
D) decreasingly smaller variances.

E) None of the above
F) A) and D)

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Question 43

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Consider the diagram presented below.Determine the system reliability if the reliabilities of the individual components are: A = 0.92,B = 0.95,C = 0.93,D = 0.99,E = 0.92,F = 0.90,G = 0.97,H = 0.96. Subsystem reliabilities: First (A,B,C): 1 - (1 - 0.92)(1 - 0.95)(1 - 0.93)= 0.99972 Second (D): 0.99 Third (E,F,G,H): 1 - [1 - (0.92)(0.90)][1 - (0.97)(0.96)] = 0.9881664 System reliability = (0.99972)(0.99)(0.9881664)= 0.978011

The reliability function for a component is R(T) = e^λT.This function represents:

A process has the following distribution of a quality characteristic (x)with specification 0.80± 0.02".The data below represent measures of x and their probability of occurrence P(x).The loss function is given by L(x)= 15,000(x-T)². Determine the expected loss.

In a tolerance design process,a _____ is needed to account for engineering uncertainty regarding the maximum variation allowable and compatibility with satisfactory product performance.

DFM is intended to prevent all of the following EXCEPT:

DMADV stands for:

The probability of failure equals 1.0 minus the probability of survival.

The C_p equals 2.0 and the process standard deviation equals 1.0.Determine the tolerance spread.

A quality characteristic has a manufacturing specification (in cm)of 0.200 ± 0.05.Historical data indicate that if the quality characteristic takes on values larger than 0.25 cm or smaller than 0.15 cm,the product fails and a cost of $75 is incurred.Based on this data,answer the questions below. a.Determine the Taguchi loss function b.Estimate the loss for a quality characteristic of 0.135 cm.

Process capability is valid when measured in the presence of common cause variation.

Concept development is a highly creative activity that can be enhanced by such techniques as _____ and _____.

Which of the following statements is INCORRECT regarding quality function deployment?

A reliability of 0.98 means that,on average:

Under QFD,all operations of a company are driven by:

A customer service manager wishes to evaluate the loss of goodwill that results from customers waiting in line at the checkout counter.Identify and discuss the Taguchi Loss Function for this situation.

Which of the following is NOT a process capability index?

It is advocated in Six Sigma that design features and characteristics be dominated by engineering considerations rather than by customer requirements.

Although similar to quality function deployment,concept engineering does not provide a clear link back to the voice of the customer.