Certified Lean Six Sigma Black Belt (CLSSBB) v6.1

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Exam contains 300 questions

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

  • A. Analysis tools
  • B. Management support
  • C. Operator support
  • D. All of these answers are correct


Answer : D

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.

  • A. Sign-off
  • B. Signal
  • C. Bell to ring
  • D. Work order


Answer : B

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.

  • A. Sustaining
  • B. Sorting
  • C. Standardizing
  • D. Straightening


Answer : C

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).

  • 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


Answer : BCDE

Fractional Factorial designs are used to reduce the ____________ because the number of runs has been lowered.

  • A. Time and cost of experiments
  • B. Number of people involved
  • C. Number of data measurement points
  • D. Output summary


Answer : A

Fractional Factorial Designs are used to analyze factors to model the output as a function of inputs if Hypothesis Testing in the Analyze Phase was inadequate to sufficiently narrow the factors that significantly impact the output(s).

  • A. True
  • B. False


Answer : A

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

  • A. True
  • B. False


Answer : B

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?

  • A. 6
  • B. 9
  • C. 27
  • D. 54


Answer : C

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

  • A. True
  • B. False


Answer : A

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

  • 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


Answer : BCE

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


  • A. The air-fuel ratio explains most of the TurbineOutput variation
  • B. The Regression explains over 98% of the process variation
  • C. This Multiple Linear Regression has three statistically significant independent variables
  • D. If the air-fuel ratio increases by 1, the TurbineOutput more than triples
  • E. The SteamExitTemp explains the most variation of the TurbineOutput


Answer : DE

Which statement(s) are most correct for the Regression Analysis shown here?

  • A. The Regression explains 50.8% of the process variation
  • B. The air-fuel ratio explains most of the TurbineOutput variation
  • C. This Simple Linear Regression explains 98+% of the process variation
  • D. This Multiple Linear Regression has four statistically significant independent variables


Answer : B

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

  • 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


Answer : A

When a Belt conducts a Linear Correlation Analysis and finds that as an X increases the Y also increase then he has proven a ______________ correlation.

  • A. Negative
  • B. Positive
  • C. Monomial
  • D. Single alignment


Answer : B

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

  • 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


Answer : C

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Exam contains 300 questions

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