Free ICBB Sample Questions — IASSC Certified Lean Six Sigma Black Belt

Calculate the Rolled Throughput Yield of this process using this data. DatA. unit input: 1450, unit output: 1390, defects repaireD. 320, scrap: 60

• A. 71.33%
• B. 72.66%
• C. 73.79%
• D. 77.93%

Replication is used in DOE __________________.

• A. To estimate the error on inherent variation in the process
• B. To identify the factors
• C. To set the levels
• D. To determine whether two factors are interacting or not

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

Modern quality management recognizes the importance of all the following except:

• A. Customer satisfaction
• B. Inspection over prevention
• C. Continuous improvement
• D. Management responsibility

Sally and Sara sell flower pots at their garage sale. Sally motivates Sara mentioning that they will sell a minimum of 15 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 13.6 pots per day were sold with a Standard Deviation of 0.7 pots. The statistical Degrees of Freedom for this example are?

• A. 1
• B. 29
• C. 30
• D. 31
• E. 2

Which of the following non parametric tests is appropriate for testing the equality of population medians for two or more population?

• A. Mann-Whitney test
• B. Kruskal-Wallis test
• C. Friedman test
• D. Runs test

What dollar amount of savings would a project show if it reduced your outstanding Accounts Receivable by $0.9 million dollars to $3.5 million total and your organizations marginal cost of capital was 5.7%?

• A. $49,250
• B. $51,300
• C. $117,500
• D. $202,424

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.

• A. Business Case
• B. Project Doctrine
• C. Management Justification
• D. Process Owner Disclosure

Which of the following activities takes place in the ‘forming’ stage?

• A. Conciliation of team member’s differences through acceptance of individuality of team members as well as common goals
• B. Discussions about the team’s dynamics
• C. Team members begin to know each other and their task at hand
• D. The project team obtains appreciation for their performance

When a Belt implements an improvement that is automated thus requiring no particular understanding for use he has applied which Lean tool?

• A. Mistake Proofing
• B. Kaizen Event
• C. 5S
• D. None

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

How many experimental runs exist in a Full Factorial and fully randomized design for 5 factors with 2 replicates for the Corner Points and no Center Points? The factors in the experiment are only at 2-levels.

• A. 10
• B. 128
• C. 256
• D. 64

Assessing process proportion as opposed to evaluating a process with respect to a set target can be done using which of these?

• A. Process proportion equals some value range
• B. Process proportion equals some desired value
• C. Target is current
• D. Proportion of the tail is equal

Which of the following is not a disadvantage of the 5 Whys?

• A. The 5 Whys can be subjective
• B. If the investigators do not possess enough skill and knowledge on the topic, they cannot find the causes of the problem
• C. The 5 Whys cannot be easily learnt and applied as it requires no statistical analysis
• D. The 5 Whys help to identify only one root cause of a problem

When a Belt creates a Process Map she will use a __________________ to depict a decision point requiring a Yes or No decision.

• A. Circle
• B. Square
• C. Diamond
• D. Rectangle