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

A population is bimodal with a variance of 5.77. One hundred samples of size 30 are randomly collected and the 100 sample means are calculated. The standard deviation of these sample means is approximately:

A quality leader who did extensive work with Japanese industry is:

The preferred method for determining statistically whether factor A or B is significant requires what additional information?

The word “champion” in the context of Six Sigma projects refers to:

This table displays the inventory of fasteners in a storage cabinet. An item is selected at random from the fastener cabinet. Find the approximate probability it is size 3/4.

If DPU = 0.022, the RTU is approximately:

The leader in the quality movement who recommended that organizations “eliminate numerical quotas for the work force and numerical goals for management”:

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?

This table displays the inventory of fasteners in a storage cabinet. An item is selected at random from the fastener cabinet.

Find the approximate probability it is larger than 1/2.

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

The quality leader responsible for the term Total Quality Management (TQM):

Find Cp and Cpk.

A random sample of 2500 printed brochures is found to have a total of three ink splotches. The rate of ink splotches in PPM is:

If the probability that event A occurs is 0.51, the probability that event B occurs is 0.64 and that probability that both A and B occur is 0.23 then:

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.

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.

After some more work on the dryer, additional data are collected which when plotted looks like this:

Which type of variation dominates?

A team is investigating ways to reduce power outages. They determine that an outage can occur in only three ways: grid failure, local transformer failure or local overload. They then investigate each of these three events for possible causes, etc. They draw a diagram that “fans out” using the power outage as the handle of the fan.

These improvements are best described by which approach to problem solving?

There are 14 different defects that can occur on a completed time card. The payroll department collects 328 cards and finds a total of 87 defects. DPMO =:

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

Find the value of (6) in the ANOVA table. Assume:

This experimental design is an example of:

A project that lacks a clear definition of its scope and boundaries runs the risk of:

A team wants a technique for displaying the connection between various customer needs and various features on a product. They should use:

This table displays the inventory of fasteners in a storage cabinet. A bolt is selected at random from the fastener cabinet. Find the approximate probability it is size 7/8.

Which of the following tools would be most appropriate for collecting data to study the symptoms of a problem?

__________________can be measured against a benchmark in a process.

A six sigma team has been chartered to improve the way in which a company takes orders for its products. Which of the following tools should the team use to determine all of the potential pitfalls and the actual defects that occur?

A six sigma team has been formed to improve an existing process. Which of the following tools should the team use first to gain a clear understanding of the current process?

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

85.3 8 2 7 7 6 8 8 9 5.

What control chart should be used?

Which of the following measures is increased when process performance is improved?

An example of a project metric would be:

A newspaper article describes a high positive correlation between obesity and orange juice consumption among six-year-olds. Parents who restrict the use of orange juice for their children have:

A six sigma project to reduce billing statement expenses has shown the need to hire two additional mailroom clerks. Based on this information, which of the following metrics should be used to measure the financial benefits of the project?

Typically, which of the following activities is done earliest in the formation of a project team?

If it is desirable to maximize the response R, the following levels should be used:

You are a Project Manager wanting to compare on time delivery (%) of Team Leads across 4 teams, your choice of technique would be?

Which of the following tools is commonly used in the define phase of a project?

Which of the following is NOT an advantage of using a median?

An x-bar and R chart has four part measurements per sample. The control limits on the averages chart are 2.996 and 3.256. Assume the process data form a normal distribution. What is the probability that the next plotted point falls outside the control limits?

In Control chart interpretations, how many business rules (Shewart Rule's) will be used to interpret for stable process?

Find the value of b or b0:

Which of the following activities is value-added?

This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 13?

Typically, which of the following actions is NOT used to reduce process cycle time?

The word takt is closest to the theory of constraints word:

In measurement system analysis, which of the following pairs of data measures is used to determine total variance?

When σ = 10, what sample size is needed to specify a 95% confidence interval of ±3 units from the mean?

A and B are events. P(A) = 0.80 and P(B) = 0.90

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?

Correction, over-production, inventory, and motion are all examples of