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IASSC ICBB IASSC Lean Six Sigma – Black Belt Exam Practice Test

Demo: 45 questions
Total 300 questions

IASSC Lean Six Sigma – Black Belt Questions and Answers

Question 1

The method of Steepest Ascent guides you toward a target inside the original inference space.

Options:

A.

True

B.

False

Question 2

Data that can be measured on a continuum and has meaningful decimal subdivisions are __________ data.

Options:

A.

Continuous

B.

Surplus

C.

Discrete

D.

Variable

Question 3

Which Element of Waste best describes "the unnecessary movement of materials and goods"?

Options:

A.

Overprocessing

B.

Inventory

C.

Motion

D.

Conveyance

Question 4

To be an effective Lean Six Sigma practitioner one must understand the difference between ___________________________.

Options:

A.

ANOVA and the Analysis of Variance

B.

Nonparametric tests and tests of Non-normal Data

C.

Practical and Statistical significance

D.

F-test and test of variances of 2 samples

Question 5

Early in a project a Belt will want to begin to identify and evaluate risk factors for the subject process and will therefore begin building a(n) ________.

Options:

A.

FMEA

B.

SIPOC

C.

X-Y Diagram

D.

Team Charter

Question 6

A Belt working in a supply chain environment has to make a decision to change suppliers of critical raw materials for a new product upgrade. The purchasing manager is depending on the Belt’s effort requiring that the average cost of an internal critical raw material component be less than or equal to $3,600 in order to stay within budget. Using a sample of 42 first article components, a Mean of the new product upgrade price of $3,200 and a Standard Deviation of $180 was estimated. Based on the data provided, the Z value for the data assuming a Normal Distribution is?

Options:

A.

1.11

B.

2.22

C.

4.30

D.

5.42

Question 7

When variation is removed from the output of a process then the process customer can have more confidence in the experience that results from the process.

Options:

A.

True

B.

False

Question 8

A Factorial Experiment based on a Level 2 Design with 6 factors would require 16 runs to fully assess the interactions.

Options:

A.

True

B.

False

Question 9

The primary objective in removal of waste is to improve the Order Production Cycle where the time from _________________ to the time of receipt of payment is compressed.

Options:

A.

Shift start

B.

Product development

C.

Receipt of an order

D.

New fiscal year

Question 10

At the very initiation of a project a Belt must develop a concise _______________ that states at a high level the area of concern and why it is important this issue be improved.

Options:

A.

Business Case

B.

Project Doctrine

C.

Management Justification

D.

Process Owner Disclosure

Question 11

Which Element of Waste best describes "the unnecessary movement of materials and goods"?

Options:

A.

Overprocessing

B.

Inventory

C.

Motion

D.

Conveyance

Question 12

Which one of these tools is frequently used to help drill down to possible causes once a Fishbone Diagram is constructed?

Options:

A.

3 When Analysis

B.

5 Why Analysis

C.

Ishikawa Diagram

D.

Skeleton Diagnostic

Question 13

Time is always the metric on the horizontal scale of a(n) ___________ Chart.

Options:

A.

Pareto

B.

Xbar

C.

Multi-Vari

D.

NP

Question 14

Which of these items contribute to what is necessary for successful Kaizen events?

Options:

A.

Analysis tools

B.

Management support

C.

Operator support

D.

All of these answers are correct

Question 15

One of the foundations of Lean Six Sigma is the concept that the output of a process (Y) is influenced by the process inputs (X’s) and is commonly shown as which formula?

Options:

A.

Y = Z(X2)

B.

Y = f(X3)

C.

Y = f(Xn)

D.

Y = g(X+ 1.5)

Question 16

For a batch manufacturing process, while assessing short term process variation, which variation category(ies) should one need to focus on? (Note: There are 2 correct answers).

Options:

A.

Variation within consecutive pieces

B.

Variation among consecutive batches

C.

Variation among groups of pieces

D.

Variation among the completed product

Question 17

Fractional Factorial, ____________and Response Surface Method are types of planned experiments.

Options:

A.

Multi-Vari Analysis

B.

Baldridge Channels

C.

One Factor at a Time or OFAT

D.

Factorial Design

Question 18

Screening experiments are the proper choice when a Belt is faced with the situation of highly Fractional Factorial Designs.

Options:

A.

True

B.

False

Question 19

The _______ is the most frequently occurring value in a distribution of data.

Options:

A.

Median

B.

Mean

C.

Center Point

D.

Mode

Question 20

Which statement(s) are correct about the Factorial Plot shown here? (Note: There are 3 correct answers).

Options:

A.

When the cutting speed increased from low to high level, the tool age increases

B.

The coefficient of the metal hardness is positively related to the output of tool age

C.

The coded coefficient is lower for cutting speed than the cutting angle related to the output of tool age

D.

These plots prove a statistically significance factor with 95% confidence

E.

These plots are an example of interaction plots

Question 21

A fundamental rule is that both Standard Deviation and Variance can be added.

Options:

A.

True

B.

False

Question 22

Which statements are correct about the advanced Capability Analysis shown here? (Note: There are 3 correct answers).

Options:

A.

This is a Poisson Capability Analysis

B.

The average DPU with 95% confidence is between 0.024 and 0.0295

C.

The DPU does not seem to vary depending on sample size

D.

The process shows only one instance of being out of control statistically so we have confidence in the estimated DPU of this process

E.

The maximum DPU in one observation was nearly 0.0753

Question 23

Which Experimental Design typically is most associated with the fewest number of input variables or factors in the design?

Options:

A.

Fractional Factorial design

B.

Full Factorial design

C.

Simple Linear Regression

D.

Response Surface Design

Question 24

Which statement(s) are correct about the Regression shown here? (Note: There are 2 correct answers).

Options:

A.

The dependent variable is the outside temperature

B.

The relationship between outside temperature and number of customers per hour is a Linear Regression

C.

The dashed lines indicate with 95% confidence where all of the process data should fall between

D.

The dashed lines indicate with 95% confidence the estimate for the Quadratic Regression Line

E.

The predicted number of customers per hour is close to 5 if the outside temperature is 10 deg C

Question 25

The Mann-Whitney test is a powerful test and is unique to situations from which of the choices listed? (Note: There are 2 correct answers).

Options:

A.

Testing the identity of two populations

B.

Focuses on equality of the Median of the two populations

C.

Less powerful than the traditional “t-test”

D.

More widely applicable than the traditional “t-test”

Question 26

The Waste of Overproduction is defined as ______________________.

Options:

A.

The unnecessary movement of people and equipment

B.

The liability of materials that are bought, invested in and not immediately sold or used

C.

Producing more than the next step needs or more than the customer buys

D.

The extra movement of material

Question 27

SPC Charts are used extensively in different business and decision-making environments. In this example a vendor is being selected based on speed of delivery. Which of the conclusions would help you pick a vendor for your needs regarding lead-time of delivery from your vendors? (Note: There are 4 correct answers).

Options:

A.

Vendor A with a much shorter lead time in delivery

B.

Vendor B as it has a better consistency (lower variance) on lead time

C.

Vendor B as Vendor A shows a situation out of control as shown in red

D.

Vendor B as the Control Limits are much narrower than Vendor A

E.

Vendor B with higher lead time, but a process with much narrower Control Limits

Question 28

Review the analysis shown here.

Which statements are true about the process? (Note: There are 3 correct answers).

Options:

A.

The initial focus for this project would be to determine why the thicknesses are so frequently too low.

B.

The majority of the process is closer to the lower specification limit.

C.

This process is described with the Weibull Distribution.

D.

The process has more problems with Variation than Centering.

E.

The process follows a non-normal distribution with the given data.

Question 29

A ___________ problem in the Measurement System suggests that there is a lack of consistency in the measurement over time.

Options:

A.

Linearity

B.

Bias

C.

Stability

D.

Magnitude

Question 30

An example of the waste of mismanaged Inventory is __________.

Options:

A.

Capital costs of money

B.

Value decrease from aged inventory

C.

Cost of storage space

D.

All of these answers are correct

Question 31

Which of these graphs demonstrates conditions which would be sufficient to enable OCAP for the process? 

Options:

A.

Xbar Chart

B.

Time Series Chart

C.

Neither

D.

Both

Question 32

A Personal Trainer was assessing her workout class participants for their body fat content and had to include data for her analysis. One of the columns listed the range of weight of the people included in the studies. This required plotting a Histogram of the weight of the people assessed for their body fat content. While drawing the Histogram the x-axis contained a certain scale of data. Pick the scale of data that is appropriate for Histograms.

Options:

A.

Ordinal Scale Data

B.

Ration Scale Data

C.

Nominal Scale Data

D.

Interval Scale Data

Question 33

Of the various types of data shown below which is NOT representative of Variable Data.

Options:

A.

Length of a table

B.

Liters of solution added to a formula

C.

Number of employees wearing a uniform

D.

Miles per hour of a vehicle

Question 34

When a Belt decides to use written procedures and visual controls to improve the consistency of the tasks that must occur in the process he is improving he has utilized the _________________ activity of 5S.

Options:

A.

Sustaining

B.

Sorting

C.

Standardizing

D.

Straightening

Question 35

It would be more likely than not for a Belt conducting a Regression Analysis to find that the _______________________.

Options:

A.

r2 value is smaller than the absolute value of r

B.

Correlation Coefficient equals r2

C.

Coefficient of Determination is less than r2

D.

Correlation Coefficient equals r divided by 2

Question 36

A fundamental rule is that both Standard Deviation and Variance can be added.

Options:

A.

True

B.

False

Question 37

For the data shown here which statement(s) are true? (Note: There are 2 correct answers).

Options:

A.

With 95% confidence, we cannot conclude if the samples are from three Normal Distributions.

B.

With greater than 95% confidence, we conclude the samples are from Non-normal Distributions.

C.

If we wanted to compare the Central Tendencies of these three samples we would use the one way ANOVA test.

D.

If we wanted to compare the Central Tendencies of these three samples we could use Mood’s Median test.

Question 38

In a good Measurement System the most variation will be with part-to-part measurements. What should you do if the majority of variation is associated with the Gage R&R assuming the gage is technically capable?

Options:

A.

Focus on fixing the Repeatability and Reproducibility of the measurement device

B.

Purchase a new machine

C.

Focus on trimming the Part-to-Part variation

D.

Run another MSA test with the machine

Question 39

If in an experiment all possible variable pairs sum to zero the design is Orthogonal.

Options:

A.

True

B.

False

Question 40

The Mann-Whitney test is a powerful test and is unique to situations from which of the choices listed? (Note: There are 2 correct answers).

Options:

A.

Testing the identity of two populations

B.

Focuses on equality of the Median of the two populations

C.

Less powerful than the traditional “t-test”

D.

More widely applicable than the traditional “t-test”

Question 41

The validity of the decision made with Hypothesis Testing is dependent upon all of these except ___________________.

Options:

A.

Beta risk

B.

Alpha risk

C.

Range of data

D.

Sample size

Question 42

Kanban establishes a means of monitoring production, conveyance and delivery information such that efficient flow is established. The method used by Kanban is to require a _________ before anything moves.

Options:

A.

Sign-off

B.

Signal

C.

Bell to ring

D.

Work order

Question 43

From the variance F-test shown above, which of these conclusions is/are valid?

Options:

A.

The variance between the class score distribution is not significantly different

B.

This test applies only to Normal Distributed data at 99 % confidence

C.

The variance between the class score distribution is significantly different

D.

There are not enough data points to make any statistical conclusions

Question 44

As a means of measuring the effects on other areas of a process as a result of changes in the primary metric we also define and track ________________.

Options:

A.

Parallel process metrics

B.

Secondary metrics

C.

Tertiary metrics

D.

Industry standards

Question 45

A ___________ is used primarily to track the stability of the average value of a metric of interest.

Options:

A.

NP Chart

B.

Xbar-R Chart

C.

I-MR Chart

D.

C Chart

Demo: 45 questions
Total 300 questions