QOM 2017 - Six Sigma - Test 2012B

Question 1

1. In order for a problem to be solved correctly,
which of the following must occur first?
A. The problem must be defined.
B. Relevant data must be gathered.
C. The measurement system must be
validated.
D. The process must be mapped.

Answer 1

A. The problem must be defined.

Question 2

2. Consider a process, which is assumed to follow a normal distribution. If the nominal (target) is set at the center of the distribution, and the specification limits are set at ± 3σ from the center, the Cpk is equal to:
A. 0.25
B. 1.00
C. 1.33
D. 1.67

Answer 2

B. 1.00

Question 3

3. Comparing two popular tools, AIM analysis and Fishbone analysis, what is most relevant:
A. Fishbone (Ishikawa) is more commonly
used than AIM in the Analyze phase to
organize potential causes to a problem
B. Fishbone cannot replace AIM in the
Define phase to visualize ideas and
relation between problems
C. AIM influences language and mind-sets in
a higher extent than Fishbone does
D. All of the above

Answer 3

D. All of the above

Question 4

Compared to a two-level factorial experiment, which of the following is an advantage of an experiment using three levels?
A. Interaction effects can be estimated
B. Curvature can be characterized
C. The design can be augmented
D. Efficiency is maximized in the experimental effort

Answer 4

B.Curvature can be characterized

Question 5

The lack of Repeatability is defined as:
A. the variation obtained when the same object is measured by the same operator with different measuring instruments
B. the variation obtained when different operators are measuring the same object
with the different measuring instruments
C. the variation obtained when an operator is repeatedly measuring the same object
with the same measuring instrument
D. the variation obtained when different
operators are measuring the same object with the same measuring instrument

Answer 5

C. the variation obtained when an operator is repeatedly measuring the same object
with the same measuring instrument

Question 6

What is the goal of Repeatability and Reproducibility studies (R&R-studies)?
A. to identify dominant sources of measurement variation
B. to investigate whether the measurement system under study is usable for the intended task
C. to identify control factors
D. to identify interactions between CTQs

Answer 6

B. to investigate whether the measurement system under study is usable for the intended task

Question 7

The most important aspect of functional requirements is that they
A. describe a single, measurable performance
B. describe how a product or service should operate
C. are traceable to the voice of the customer
D. provide upper and lower performance limits

Answer 7

C. are traceable to the voice of the customer

Question 8

The Pareto chart is a good tool for
A. identifying interactions between different
parameters
B. identifying whether a data set actually is
comprised of two sets of data with
different distributions
C. identifying the largest effects among a
large number of effects
D. finding trends in data sets

Answer 8

C. identifying the largest effects among a

large number of effects

Question 9

For a normal distribution, two standard deviations on each side of the mean would include what percentage of the total population?
A. 47%
B. 68%
C. 95%
D. 99%

Answer 9

C. 95%

Question 10

Correction, over-production, inventory, and motion are all examples of
A. waste
B. 5S target areas
C. noise
D. value-added activities

Answer 10

A. waste

Question 11

The main purpose of using robust design is
A. to maximize yield
B. to remove noise factors
C. to minimize the impact of noise factors
on response variable
D. all of the above

Answer 11

C. to minimize the impact of noise factors

on response variable

Question 12

In the context of a 2^k
out that the interaction between factor A and factor B is non-active, it means that the interaction analysis proves that
factorial design, if it is found
A. factor A is independent of factor B (isn’t this correct to – partly)
B. factor A is dependent on factor B and vice versa
C. the effect of factor A on the response variable is dependent on the level of factor B
D. none of the above

Answer 12

D. none of the above

Question 13

Which of the following is a strategy to quantify noise in a statistical experiment design?
A. Randomization
B. Replication
C. Blocking
D. Noise factorization

Answer 13

B. Replication

Question 14

Which of these designs is saturated?
A. 2^7-3
B. 2^7-4
C. 2^7-5
D. None of the above

Answer 14

B. 2^7-4

Question 15

When using X-bar chart, selecting sigma limit lower than three (e.g. 2.5-sigma limit) will lead to
A. higher sensitivity of the chart
B. lower ARL0 (average run length when the
process is stable)
C. higher type I error (alpha)
D. all of the above

Answer 15

D. all of the above

Question 16

Doing VA/NVA analysis from a VSM has the objectives below. One is unfortunately wrong. Which one is it?
A. Identify and eliminate the hidden costs that do not add value for the customer
B. Reduce unnecessary process complexity
C. Reduce process steps cycle time
D. Reduce process lead time

Answer 16

C. Reduce process steps cycle time

Question 17

The primary factor in the successful implementation of six sigma is to have
A. the necessary resources
B. projects related to business measures
C. explicit customer requirements
D. a comprehensive training program

Answer 17

B. projects related to business measures

Question 18

The control plan is one of major deliveries from a Six Sigma project. It contains everything below EXECPT:
A. Calculations and relation of R^2 and R^2 adj
B. Links between critical factors and big Y
C. SOP for preventive maintenance and
gauge control
D. Local control of process correction and resources

Answer 18

A. Calculations and relation of R and R adj

Question 19

R^2 is recommended to be over a certain limit (e.g. 80%) in order to:
A. Ignore p-values above 5 %
B. Accept a model as a reasonable explanation of the variation in the data
C. Claim that all residuals follow normal
distribution with zero mean
D. Eliminate the least significant factor from
the model

Answer 19

B. Accept a model as a reasonable explanation of the variation in the data

Question 20

A combination of both Shewhart control charts and EMWA control charts is recommended included in the control plan since:
A. The risk of false alarms decreases
B. Amount of measurements decreases
C. Number of both attribute and continuous
measures monitored increases
D. Sensitivity to both trend changes and
special causes increase

Answer 20

D. Sensitivity to both trend changes and

special causes increase

Question 21

When testing sample mean of bottle’s weight using the following hypothesis, H0:μ0=500ml and H1:μ0≥500ml, a p-value of 20% (n=40) is obtained, this means that
A. The probability of the population’s mean greater than 500ml (H1) is 1 in 5.
B. The probability of the population’s mean equal to 500ml (H0) is 1 in 5.
C. Given that the population mean is 500ml (H0), the probability of observing the sample is 1 in 5
D. Given the observed sample, the probability of the population mean is 500ml (H0) is 1 in 5.

Answer 21

C. Given that the population mean is 500ml (H0), the probability of observing the sample is 1 in 5