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CLSSBB Certified Lean Six Sigma Black Belt (CLSSBB) Questions and Answers

Questions 4

In the theory of constraints the “subordinate” step refers to:

Options:

A.

a listing of sub-processes

B.

reducing the rate for some processes

C.

the portion of the process flow chart that depends on the main flow

D.

the less important product or service stream

E.

none of the above

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Questions 5

Which of the following techniques would help increase process stability when the cause of variation is a cluttered work station?

Options:

A.

5S

B.

SMED

C.

Preventive maintenance

D.

Visual factory

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Questions 6

The critical path for a project is best described as the

Options:

A.

sequence of steps with the highest costs

B.

tasks in the project that have the highest risk of failure

C.

sum of the tasks with the shortest time requirements

D.

longest path from the start to the completion of the project

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Questions 7

Quality and the Critical-to-Quality (CTQ's) are both subjective terms that are defined by the _______________.

Options:

A.

Management team

B.

Line Supervisor

C.

Customer

D.

Design team

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Questions 8

A process shows the following number of defects. Each sample size for this process is

85. 3 8 2 7 7 6 8 8 9 5.

What control chart should be used?

Options:

A.

x-bar and R

B.

median

C.

individual and moving range

D.

p

E.

np

F.

c

G.

u

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Questions 9

If the value of the test statistic had been 0.185, what action should have been taken regarding the null hypothesis?

Options:

A.

rejected

B.

accepted

C.

none of the above

D.

all of the above

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Questions 10

Which of the following is the best technique for improving the precision of a designed experiment when the experimental material is NOT homogeneous?

Options:

A.

Blocking

B.

Confounding

C.

Randomization

D.

Fractionalizing

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Questions 11

SWOT is an acronym for:

Options:

A.

strengths, weaknesses, opportunities, threats

B.

statistics without tables

C.

sensory Weibull ordinal tools

D.

success wields optimal teams

E.

none of the above

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Questions 12

A stable, normally distributed process with specification 3.50 .03 has = 3.51 and = .016. What percent of the production violates specification?

Options:

A.

16.43%

B.

12.62%

C.

18.58%

D.

11.18%

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Questions 13

P(A) = .42, P(B) = .58, P(A&B) = .10. Find P(A or B).

Options:

A.

.90

B.

1.00

C.

.24

D.

none of the above

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Questions 14

A project activity not on the critical path has required 20% longer than the time originally allocated. The project team should:

Options:

A.

inform all concerned that the entire project will be delayed by 20%

B.

inform all concerned that the entire project will be delayed but by less than 20%

C.

study the effect this will have on other activities because the project may still be on schedule

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Questions 15

Find the value of (2) in the ANOVA table. Assume:

Options:

A.

16.4

B.

3.2

C.

18.6

D.

23.2

E.

4.54

F.

12.2

G.

0.525

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Questions 16

P(A) = .42, P(B) = .58, P(A&B) = .10. Are A and B (statistically) independent?

Options:

A.

yes

B.

no

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Questions 17

George is an employee of Black, Inc. John is George’s internal customer. Which statement is true?

Options:

A.

John is employed by Black, Inc.

B.

John is employed by another company that supplies material to Black, Inc.

C.

John is employed by a company that purchases material from black, Inc.

D.

John is employed by another company that has a fiduciary agreement with Black, Inc.

E.

John is employed by another company as an internal auditor.

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Questions 18

Use the reliability formula from the previous problem to find the reliability at MTBF.

Options:

A.

0.94

B.

0.78

C.

0.37

D.

0.26 E. none of the above

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Questions 19

In comparison to a full-factorial design of experiment (DOE), a traditional, one-at-a-time approach will

Options:

A.

miss interactions

B.

gain efficiencies

C.

save time

D.

cost less

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Questions 20

This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 1?

Options:

A.

B.

C.

D.

none of the above

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Questions 21

This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 11?

Options:

A.

B.

C.

D.

none of the above

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Questions 22

The null hypothesis should be:

Options:

A.

rejected

B.

not rejected

C.

accepted

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Questions 23

If a process follows an exponential distribution with a mean of 25, what is the standard deviation for the process?

Options:

A.

0.4

B.

5.0

C.

12.5

D.

25.0

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Questions 24

The formula for reliability during constant failure rate conditions is: Use this formula to find the reliability of a product at 800 hours if MTBF = 600 hours.

Options:

A.

0.87

B.

0.78

C.

0.37

D.

0.26

E.

none of the above

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Questions 25

Which of the following is an element of standard work?

Options:

A.

Takt time

B.

Product cost

C.

Product value

D.

Maximum inventory

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Questions 26

This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 14?

Options:

A.

B.

C.

D.

none of the above

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Questions 27

Which of the following performance measures is most appropriate for evaluating the tangible effects of a six sigma project?

Options:

A.

Cycle time

B.

Team member absentee rate

C.

Employee morale

D.

Unsolicited compliments from customers

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Questions 28

“Robust design” refers to the ability of the product or service:

Options:

A.

to function the same in different conditions

B.

to remain strong

C.

to last a long time

D.

to have a high reliability

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Questions 29

The average number of defects is 21.6. Find the upper control limit for the c-chart.

Options:

A.

26.4

B.

24.6

C.

18.8

D.

26.2

E.

none of the above

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Questions 30

Perform a risk analysis to determine the expected profit or (loss) from a project which has four possible disjoint outcomes:

Outcome A shows a profit of $340,000 and has a probability of 0.25.

Outcome B shows a profit of $120,000 and has a probability of 0.40.

Outcome C shows a loss of $40,000 and has a probability of 0.10.

Outcome D shows a profit of $100,000 and has a probability of 0.25.

Options:

A.

$130,000

B.

$520,000

C.

$154,000

D.

($168,000)

E.

none of the above

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Questions 31

A machine tool vender wants to sell an injection molding machine. The current machine produces 3.2% defectives. A sample of 1100 from the vender’s machine has 2.9% defective. Do these numbers indicate that the proposed machine has a lower rate of defectives?

Options:

A.

yes

B.

no

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Questions 32

A population of size 1,000,000 has mean 42 and standard deviation 6. Sixty random samples, each of size 15 are selected. According to the Central Limit Theorem the distribution of the sixty sample means has a standard deviation of approximately:

Options:

A.

6

B.

6/42

C.

6/15

D.

6/ 15

E.

none of the above

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Questions 33

A higher resolution number for an experimental design indicates that:

Options:

A.

results are more clear

B.

confounding between main effects and interaction effects are less likely to be significant

C.

a higher number of replications have been used

D.

all factors have been tested at all levels

E.

the design is more balanced

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Questions 34

Calculate the main effect of factor A (i. e. A+ – A– ).

Options:

A.

46

B.

129

C.

83

D.

–46

E.

none of the above

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Questions 35

A management team lists nine goals across the top of a rectangle and 15 activity initiatives along the left hand side of the rectangle. If one of the activities strongly supports one of the goals a circle is placed in the box where that activity’s row intersects the goal’s column. If the activity’s support is very strong a “bulls eye” is placed in the box and if the support is weak a triangle is used.

This best describes which problem solving tool?

Options:

A.

Affinity diagram

B.

Inter-relationship digraph

C.

Tree diagram

D.

Process decision program chart

E.

Matrix diagram

F.

Prioritization matrix

G.

Activity network diagram

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Questions 36

In a resolution III fractional factorial experimental design, main effects are confounded with:

Options:

A.

one factor interactions

B.

two factor and higher interactions

C.

three factor and higher interactions

D.

no other effects

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Questions 37

The team in the above problem draws arrows from Post-It® notes that are causes to notes that are the effects of these causes. This step is best described by which approach to problem solving?

Options:

A.

Affinity diagram

B.

Inter-relationship digraph

C.

Tree diagram

D.

Process decision program chart

E.

Matrix diagram

F.

Prioritization matrix

G.

Activity network diagram

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Questions 38

A team working with a plant relocation is tasked with designing a process for moving 180 pieces of equipment. Incoming orders may need to be filled during the move at either the old site or the new one. Transportation equipment availability is uncertain. Construction schedules at the new site is very weather dependent. The team designs a chart that attempts to cover these and other contingencies with appropriate measures dealing with each.

The tool best fitted for this task is:

Options:

A.

Affinity diagram

B.

Inter-relationship digraph

C.

Tree diagram

D.

Process decision program chart

E.

Matrix diagram

F.

Prioritization matrix

G.

Activity network diagram

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Questions 39

A sample of size 50 from machine A has a mean of 18.2 and standard deviation 3.1. A sample of size 40 from machine B has mean 17.6 and standard deviation 2.8. Do these data indicate that the population for machine A has a larger mean? Assume the populations are normal.

Options:

A.

yes

B.

no

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Questions 40

Find the value of (7) in the ANOVA table. Assume:

Options:

A.

16.4

B.

3.2

C.

18.6

D.

23.2

E.

4.54

F.

12.2

G.

0.525

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Questions 41

A team’s goal is to improve information flow in a payroll function. They make thirty-three Post-It® notes, each listing an issue for further investigation. After some discussion, they group them into four categories: mandated record keeping, privacy concerns, insurance concerns and transfer concerns.

This grouping process is best described by which approach to problem solving?

Options:

A.

Affinity diagram

B.

Inter-relationship digraph

C.

Tree diagram

D.

Process decision program chart

E.

Matrix diagram

F.

Prioritization matrix

G.

Activity network diagram

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Questions 42

The term “expected value” is closest to the term:

Options:

A.

median

B.

probabilistic model

C.

mean

D.

Markov value

E.

regressive value

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Questions 43

This experimental design is an example of:

Options:

A.

full factorial

B.

half fractional factorial

C.

fractional factorial

D.

ANOVA design

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Questions 44

A team wants a technique for doing an initial study of a process that not every team member is familiar with. They should use:

Options:

A.

written and diagrammed work instructions

B.

flow charts and process maps

C.

cause and effect diagrams

D.

Pareto chart

E.

relationship matrix

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Questions 45

In a series of linked processes and associated feedback loops the product or service flows ________ and the information flows ________.

Options:

A.

rapidly, slower

B.

downstream, upstream

C.

evenly, digitally

D.

sooner, later

E.

to the customer, from the supplier

F.

none of the above

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Questions 46

A helpful time to use a Quality Function Deployment matrix is:

Options:

A.

while planning for a new or redesigned process

B.

while planning for new or redesigned parts

C.

while planning for a new or redesigned product

D.

all of the above E. none of the above

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Questions 47

If special causes are assigned in the process variations, then the UCL and LCL would be recomputed without removing those outliers. (True/False)

Options:

A.

True

B.

False

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Questions 48

Legal requirements specify that a bottled product must contain at least the volume printed on the label. A bottling company wants to reduce the amount of overfilled bottles.

On the basis of the data above, what is the most effective strategy to accomplish this task?

Options:

A.

Decrease the target fill volume only

B.

Decrease the target fill variation only

C.

First decrease the target fill volume, then decrease the target fill variation

D.

First decrease the target fill variation, then decrease the target fill volume

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Questions 49

The primary reason that most companies implement six sigma is to

Options:

A.

reduce defects

B.

improve processes

C.

improve profit

D.

increase customer satisfaction

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Questions 50

SCENARIO A Six Sigma team is measuring the moisture content of corn starch as it leaves the conveyer belt of a dryer. They collect one sample four cups of starch at times indicated in the chart at fixed locations labeled A, B, C, and D across the end of the belt. See the diagram below.

The data for a nine hour period are:

Which type of variation dominates? (Hint: Plot the points on the graph above.)

Options:

A.

within sample

B.

sample to sample within the hour

C.

hour to hour

D.

none of the above

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Questions 51

Find the value of (9) in the ANOVA table. Assume:

Options:

A.

16.4

B.

3.2

C.

18.6

D.

23.2

E.

4.54

F.

12.2

G.

0.525

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Questions 52

In problem 1, do the data indicate that the population for machine A has a larger standard deviation?

Options:

A.

yes

B.

no

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Questions 53

The median is a better choice than the mean for a measure of central tendency if the data:

Options:

A.

is bimodal

B.

often has outliers

C.

is normally distributed

D.

is exponentially distributed

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Exam Code: CLSSBB
Exam Name: Certified Lean Six Sigma Black Belt (CLSSBB)
Last Update: Apr 21, 2024
Questions: 227
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