Questions 5

Which of the following techniques would help increase process stability when the cause of variation is a cluttered work station?

Questions 7

Quality and the Critical-to-Quality (CTQ's) are both subjective terms that are defined by the _______________.

Questions 8

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?

Questions 9

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

Questions 10

Which of the following is the best technique for improving the precision of a designed experiment when the experimental material is NOT homogeneous?

Questions 12

A stable, normally distributed process with specification 3.50 .03 has = 3.51 and = .016. What percent of the production violates specification?

Questions 14

A project activity not on the critical path has required 20% longer than the time originally allocated. The project team should:

Questions 17

George is an employee of Black, Inc. John is George’s internal customer. Which statement is true?

Questions 18

Use the reliability formula from the previous problem to find the reliability at MTBF.

Questions 19

In comparison to a full-factorial design of experiment (DOE), a traditional, one-at-a-time approach will

Questions 20

This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 1?

Questions 21

This QFD matrix was used in the design process for a ball point pen. What symbol is appropriate for the square labeled 11?

Questions 23

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

Questions 24

The formula for reliability during constant failure rate conditions is: Use this formula to find the reliability of a product at 800 hours if MTBF = 600 hours.

Questions 26

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

Questions 27

Which of the following performance measures is most appropriate for evaluating the tangible effects of a six sigma project?

Questions 29

The average number of defects is 21.6. Find the upper control limit for the c-chart.

Questions 30

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.

Questions 31

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?

Questions 32

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 standard deviation of approximately:

Questions 35

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?

Questions 36

In a resolution III fractional factorial experimental design, main effects are confounded with:

Questions 37

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?

Questions 38

A team working with a plant relocation is tasked with designing a process for moving 180 pieces of equipment. Incoming orders may need to be filled during the move at either the old site or the new one. Transportation equipment availability is uncertain. Construction schedules at the new site is very weather dependent. The team designs a chart that attempts to cover these and other contingencies with appropriate measures dealing with each.

The tool best fitted for this task is:

Questions 39

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.

Questions 41

A team’s goal is to improve information flow in a payroll function. They make thirty-three Post-It® notes, each listing an issue for further investigation. After some discussion, they group them into four categories: mandated record keeping, privacy concerns, insurance concerns and transfer concerns.

This grouping process is best described by which approach to problem solving?

Questions 44

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

Questions 45

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

Questions 47

If special causes are assigned in the process variations, then the UCL and LCL would be recomputed without removing those outliers. (True/False)

Questions 48

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?

Questions 50

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.)

Questions 52

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

Questions 53

The median is a better choice than the mean for a measure of central tendency if the data:

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