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ICBB Sample Questions Answers

Questions 4

“A calculated time frame that matches customer demand” is a definition of what Lean Principles term?

Options:

A.

Value Stream

B.

Kaizen event

C.

Takt time

D.

Kanban

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Questions 5

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 $3,800 in order to stay within budget. Using a sample of 38 first article components, a Mean of the new product upgrade price of $3,680, and a Standard Deviation of $120 was estimated. In order to increase the Long Term Z value to 5, what is the maximum long term variation in pricing the Belt can accept for his upgraded critical raw material component?

Options:

A.

$6

B.

$12

C.

$24

D.

$48

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Questions 6

To establish a sample size that will allow the proper overlap of distributions we do which of these?

Options:

A.

Multiply Alpha by 1.75

B.

Calculate one minus Beta

C.

Calculate Beta plus 2

D.

Multiply Beta by 3

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Questions 7

A Lean Six Sigma project is attempting to reduce inventory days. The Process Capability will be monitored as part of the Control Phase to track the sustainability of the improvement.

Which distribution type is best used for performing the Capability Analysis?

Options:

A.

Weibull Distribution

B.

Normal Distribution

C.

Exponential Distribution

D.

Logistic Distribution

E.

Gaussian Distribution

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Questions 8

The Control Limits width varies if the sample size varies for which type of chart?

Options:

A.

P Charts

B.

NP Charts

C.

Xbar-R Charts

D.

Time Series Charts

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Questions 9

An ANOVA used across many dependent variables could increase the Beta risk.

Options:

A.

True

B.

False

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Questions 10

Situations where standardized work needs to be incorporated include all of these except _____________________.

Options:

A.

Machines continually operating to reduce the labor cost per piece

B.

Lack of a system to assure proper inventory levels at repair stations

C.

Changeover instructions incomplete

D.

Process flow for the same product assembly taking various cycle time for completion

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Questions 11

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 $4,200 in order to stay within budget. Using a sample of 35 first article components, a Mean of the new product upgrade price of $4,060, and a Standard Deviation of $98 was estimated. Select the answer that best states the Practical Problem.

Options:

A.

If the average cost per component is $4,200 or less, then the purchase manager will introduce the new product upgrade with new components.

B.

If the average cost per component is greater than $4,200, then the purchase manager will introduce the new product upgrade with new components.

C.

Only if the average cost per product upgrade is $4,060, will the purchase manager introduce new product upgrades with new components.

D.

If the average cost per new product upgrade is less than $180, then the purchase manager will introduce the new product upgrade with new components.

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Questions 12

Sally and Sara sell flower pots at their garage sale. Sally motivates Sara mentioning that they will sell a minimum of 22 pots per day if the outside temperature exceeds 60o F. From a sample, whose population is assumed to follow a Normal Distribution, taken for 30 days at 60 degrees or more an average of 18.2 pots per day were sold with a Standard Deviation of 0.9 pots. What is the Z value for this sales process?

Options:

A.

1.23

B.

1.62

C.

2.11

D.

4.22

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Questions 13

Each of the items listed would impact the Process Capability for a process with a continuous output except ___________________.

Options:

A.

Shape of process data distribution (e.g. Normal Distribution)

B.

Process Technology

C.

Process Standard Deviation

D.

Seasonal variation in process

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Questions 14

From this list select the items that define what an X-Y Diagram is. (Note: There are 4 correct answers).

Options:

A.

Created for every project

B.

Based on team's collective opinions

C.

Updated whenever a parameter is changed

D.

Used to show each step in a process

E.

A living document throughout project lifecycle

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Questions 15

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

Options:

A.

Median

B.

Mean

C.

Mode

D.

Center Point

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Questions 16

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

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Questions 17

The English words used for the 5S’s are Sorting, Straightening, _____________ , __________ and Sustaining. (Note: There are 2 correct answers).

Options:

A.

Shaping

B.

Shining

C.

Standardizing

D.

Signing

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Questions 18

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

Options:

A.

Overprocessing

B.

Inventory

C.

Motion

D.

Conveyance

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Questions 19

Calculate the Rolled Throughput Yield of this process using this data.

Data: unit input: 1215, unit output: 1180, defects repaired: 184, scrap: 42

Options:

A.

80.85%

B.

81.40%

C.

82.23%

D.

84.96%

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Questions 20

The Lean toolbox includes all of the following items except __________.

Options:

A.

Poke-Yoke

B.

Standard Operating Procedures

C.

Kaizen

D.

5S the work area

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Questions 21

Cost of Poor Quality (COPQ) can be classified as Visible Costs and Hidden Costs. All these items are Hidden Cost except __________________.

Options:

A.

Lost Customer Loyalty

B.

Returns

C.

Time Value of Money

D.

Late Delivery

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Questions 22

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)

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Questions 23

Which item(s) listed would impact the Process Capability for a process with a continuous output? (Note: There are 4 correct answers).

Options:

A.

Shape of process data distribution (e.g. Normal Distribution)

B.

Process Technology

C.

Process Standard Deviation

D.

Presence of Special Causes or solely Common Causes

E.

Seasonal variation in process

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Questions 24

If an experiment has 5 factors and no replicates for a 2-level Experimental Design with 16 experimental runs which statement(s) are correct? (Note: There are 3 correct answers).

Options:

A.

The Main Effects for the 5 factors are not aliased or confounded but the 2-way interactions are confounded with the 3-way interactions

B.

The Main Effects are confounded with only 4-way interactions

C.

The Experimental Design is half-fractional

D.

The experiment has 8 experimental runs with the first factor at the high level

E.

The experiment has only 4 experimental runs with the 5th factor at the high level

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Questions 25

What is the Ppk of a process with a spread of 24 units, an average of 68, an upper limit of 82 and a lower limit of 54?

Options:

A.

1.68

B.

2.00

C.

4.00

D.

4.42

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Questions 26

Which of these are examples of business metrics or Key Performance Indicators commonly referred to as KPI’s?

Options:

A.

Cycle Time

B.

Defects

C.

No. of Units Reworked

D.

Labor Hours

E.

All of these answers are correct

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Questions 27

Situations where standardized work needs to be incorporated include all of these except _____________________.

Options:

A.

Changeover instructions incomplete

B.

Lack of a system to assure proper inventory levels at repair stations

C.

Machines continually operating to reduce the labor cost per piece

D.

Process flow for the same product assembly taking various cycle time for completion

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Questions 28

Which statement(s) are correct about the DOE Factorial plot output here? (Note: There are 3 correct answers).

Options:

A.

Two factors were operated at 3 levels each

B.

The highest tool age was achieved with metal hardness at high level while keeping the cutting speed at the low level

C.

The design indicated above is a 32 factorial design

D.

The cutting speed and cutting angle are at the low level for the least tool age achieved

E.

All factors had 2 levels in the experiment

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Questions 29

A statistical test or Hypothesis Test is performed to reject or fail to reject a stated hypothesis and it converts the Practical Problem into a Statistical Problem.

Options:

A.

True

B.

False

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Questions 30

A Full Factorial experiment using a 3 level 3 factor approach has been proposed to test the viability of an extrusion machine experiment. How many treatment combinations will this approach involve?

Options:

A.

6

B.

9

C.

27

D.

54

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Questions 31

A valid Multiple Linear Regression (MLR) is characterized by all of these except _______________________.

Options:

A.

It is an assumption that the X’s (inputs) are not correlated to each other

B.

The X’s (inputs) are assumed to be independent of each other

C.

MLR is conducted based on a deliberate form of experimentation

D.

The Residuals from MLR analysis have to be Normally Distributed

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Questions 32

Which of these items are not part of what is necessary for successful Kaizens?

Options:

A.

Good lighting

B.

Management support

C.

Operator support

D.

Analysis tools

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Questions 33

A valid mathematical Regression represents all of the characteristics shown except ___________________________.

Options:

A.

The residuals when plotted follow a Normal Distribution

B.

The sum of the residuals is zero

C.

All of the standardized residuals will be within ±3 Standard Deviations

D.

Most standardized residuals are within ±2 Standard Deviations

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Questions 34

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

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Questions 35

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”

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Questions 36

The Japanese born function of a Kaizen event utilizes a specific, step-by-step approach meant to bring about major changes to a process.

Options:

A.

True

B.

False

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Questions 37

Common and ______________ Cause Variation are the focus of Statistical Process Control.

Options:

A.

Uncommon

B.

Ordinary

C.

Special

D.

Selective

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Questions 38

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

Options:

A.

Pareto

B.

Xbar

C.

Multi-Vari

D.

NP

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Questions 39

Questions that can be best answered by a Visual Factory include all of these except _____________________.

Options:

A.

Are setups optimized for lower scrap levels?

B.

Can extra inventory be seen easily?

C.

Can changeover challenges be recognized?

D.

Are unneeded tools or supplies easily noted?

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Questions 40

When the Inputs, X’s, for your process are Normally Distributed about the Mean, the Outputs, Y’s, will always be Normally Distributed.

Options:

A.

True

B.

False

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Questions 41

One of the methods of testing a Measurement System is to have at least two people take multiple readings from the same instrument and of the same sample set to judge the Repeatability and Reproducibly. This approach is called a ______________ study.

Options:

A.

Correlation Analysis

B.

Gage R & R

C.

Bimodal

D.

Dual Attribute

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Questions 42

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

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Questions 43

For her injection molding project a Belt needed to track the percentage of defectives of a particular sample set so she used a ___________ to display the data?

Options:

A.

Individual Chart

B.

C Chart

C.

Xbar Chart

D.

P Chart

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Questions 44

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

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Questions 45

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

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Exam Code: ICBB
Exam Name: IASSC Lean Six Sigma – Black Belt
Last Update: May 1, 2024
Questions: 300
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