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

All of the following experimental designs can be used to investigate interactions EXCEPT

Is this a left-tail, right-tail or two-tail test?

This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 6?

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

An experiment is conducted by checking the effect that three different pressures have on the surface appearance of a product. Ten items are produced at each of the three pressures. The number of replications, factors and levels are:

SMED is an acronym for activity that:

This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 4?

Find the value of (12) in the ANOVA table. Assume:

A robust design is one which:

A company’s accounts payable department is trying to reduce the time between receipt and payment of invoices. If the team has just completed a flowchart of the process and identified the critical steps, which of the following tools should be used next?

Find the average difference dbar.

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 most influences consumer perception of quality?

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

This will be a:

An example of a project metric would be:

A team has completed a brainstorming session that has generated a large number of ideas. The team needs to organize these ideas in natural groupings. Which tool is most appropriate?

Proposed Six Sigma projects that are not in some way linked to organizational goals:

If the value of the test statistic had been 0.185, what action should have been taken regarding the null hypothesis?

The Organization Specification limits are + 5 or - 5 % whereas Control Limits are + 6 % & -2%, justify whether the Process is?

Find Cp

At a particular time, three components are in series and each has a reliability of 0.98. What is the reliability of the system?

The number of factors, levels and replications:

Here is a partial ANOVA table. Use = 0.05. The values of x, y and z should be:

Process data being used in the initial setup of a process are assumed to have a normal distribution. If the nominal (target) is set at the center of the distribution, and the specification limits are set at ± 3σ from the center, the Cpkis equal to

Legal requirements specify that a bottled product must contain at least the volume printed on the label. A bottling company wants to reduce the amount of overfilled bottles.

On the basis of the data above, what is the most effective strategy to accomplish this task?

A change agent is responsible for helping the organization do which of the following?

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

Which of the following is not a Measure of Central Tendency?

A six sigma team has gathered data for a project proposal and is using the following notations.

I = Initial investment

C = Periodic maintenance cost

B = Benefits to be accrued

On the basis of the information above, which of the following is the criteria used to select a project?

For a normal distribution, two standard deviations on each side of the mean would include what percentage of the total population?

An advantage of using standard deviation rather than range for measuring dispersion of a large sample is that:

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 =:

(Refer to the previous problem) The variance of the five replications for each run is calculated. Most of these variances are approximately equal but two are significantly lower than the others. The experimenters would be especially interested in those two runs if they want to optimize:

Customer requirement #3 has a ______________ relationship with technical feature #3.

Find the value of (8) in the ANOVA table. Assume:

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

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

Causes in a cause and effect diagram often include management, measurement systems, mother nature and the four standard causes:

According to Deming, which of the following is NOT a key element of quality leadership?

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

A team has been asked to reduce the cycle time for a process. The team decides to collect baseline data. It will do this by:

This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 9?

A machine tool vender wants to sell an injection molding machine. The current machine produces 3.2% defectives. A sample of 1100 from the vender’s machine has 2.9% defective. Do these numbers indicate that the proposed machine has a lower rate of defectives?

Which one of the following is not a Process Improvement Methodology?

If a process follows an exponential distribution with a mean of 25, what is the standard deviation for the process?

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

Deming called the technique of studying a sample to gain understanding of the distribution of a population an “enumerative study.” His main objection to these studies was:

The diameters of 50 randomly selected shafts have a mean of 1.525 and standard deviation of 0.006. Find the 95% lower confidence limit for the population mean.

Which of the following is a component of a visual factory?

The following data were collected on the diameters of turned shafts: 2.506 2.508 2.505 2.505. These values are:

I. Attribute data

II. Discrete data

III. Variables data

IV. Continuous data

Find the value of (3) in the ANOVA table. Assume:

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:

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.

The data for a nine hour period are:

Which type of variation dominates? (Hint: Plot the points on the graph above.)

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

“Robust design” refers to the ability of the product or service:

A frequent cause of system sub optimization is:

An observation above upper control limit is concluded as?

This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 14?

What is the standard deviation of a process that operates to an exponential distribution with a mean of 25 units?

TRIZ is an acronym which refers to:

Data being used in the initial set-up of a process are assumed to have a normal distribution. If the nominal (target) is set at the center of the distribution, and the specification limits are set at ±3σ from the center, then the Cpkis equal to

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?

Find the value of (11) in the ANOVA table. Assume:

The Toyota Production System, among other things, was the birthplace for the practice of _______________.

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

The following is a set of individual measurements:

3 5 4 5 6 3 4 3 2 4 5 6 5 7 6 4 5 5 8 7 6 6 7 7 4

Find the control limits for the individuals chart.

For a line in an FMEA form a team has established the following:

Cost: $82

Severity: 7

Occurrence: 9

Detection: 4

Target date: 7 days

What should the risk priority number (RPN) be for this line:

An important step in determining the VOC is:

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

The Toronto plant produces appliances in the following distribution: Type A 23% Type B 42% Type C 35% A random sample of 300 appliances from the Texas plant has the following distribution: Type A 73 Type B 111 Type C 116 Is the distribution of appliances at the Texas plant the same as that at the Toronto plant?

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 a bolt.

If DPU = 0.022, the RTU is approximately:

The principle disadvantage of fractional factorial experiments is that:

After a team has engaged in diversion activities they may need to employ a tool for conversion. Examples of such a tool are:

I. nominal group technique

II. Multivoting

III. cause and effect diagram

IV. activity network diagram

V. matrix diagrams

According to the Central Limit Theorem:

A sample of size 50 from machine A has a mean of 18.2 and standard deviation 3.1. A sample of size 40 from machine B has mean 17.6 and standard deviation 2.8. Do these data indicate that the population for machine A has a larger mean? Assume the populations are normal.

An automatic gaging system is to be installed in a process. The gage will insert data values into a data base from which machine adjustments will be made automatically. A critical factor in specifying the equipment is:

A team wants a technique for improving consistency of assembly operations. They should use:

A management team lists nine goals across the top of a rectangle and 15 activity initiatives along the left hand side of the rectangle. If one of the activities strongly supports one of the goals a circle is placed in the box where that activity’s row intersects the goal’s column. If the activity’s support is very strong a “bulls eye” is placed in the box and if the support is weak a triangle is used.

This best describes which problem solving tool?

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

The support for an important quality initiative was lacking in congress until Reagan’s Secretary of Commerce was killed in a horseback riding accident in 1987. That initiative was:

A random sample is selected from a population of measurements. The mean of the sample is not equal to the mean of the population. This is due to:

A pharmaceutical manufacturer is designing an experiment to test four different capsule ingredients designed to reduce dissolution time. Each ingredient will be tested at 10 milligrams and 40 milligrams. A full factorial design is used with five replications per run. The number of levels, factors and runs is, respectively:

In problem 1, do the data indicate that the population for machine A has a larger standard deviation?

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. DPU =

A medicine with efficacy of .52 is given to five patients. Find the approximate probability that at least one of the patients is cured. (Hint: Use the binomial formula.)

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:

Samples of size n=36 are randomly selected from a population with mean μ = 125 and variance 12. Find the variance of the distribution of sample means.

A population is bimodal. One hundred samples of size 30 are randomly collected and the 100 sample means are calculated. The distribution of these sample means is:

The primary metric for a project is reduced cost for process A .A consequential metric could be:

A population of size 1,000,000 has mean 42 and standard deviation 6. Sixty random samples, each of size 15 are selected. According to the Central Limit Theorem the distribution of the sixty sample means has a mean of approximately:

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 a 1/2 inch bolt.

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.

(Refer to the previous problem) To estimate the within treatment variance the experimenters would calculate the variances of:

In a series of linked processes and associated feedback loops the product or service flows ________ and the information flows ________.

Find the value of (1) in the ANOVA table. Assume:

Find the value of (9) in the ANOVA table. Assume:

If the probability that event A occurs is 0.51, the probability that event B occurs is 0.64 and events A and B are statistically independent then:

Find the value of (5) in the ANOVA table. Assume:

This experimental design is an example of:

Calculate the interaction effect.

An experiment has seven factors with two levels each. The experiment has eight runs. This experimental design is called:

The primary metric for a project is reduced cost for process A. Baseline data might include: