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68 Cards in this Set
- Front
- Back
optimizing individual processes
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A frequent cause of system suboptimization is:
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Dr W. Edwards Deming:
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lectured in Japan after World War II, was an author of several books in the US, lectured widely in the US, is considered an expert in the quality field
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impact the bottom line of the enterprise
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Successful Six Sigma projects always:
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should not be approved
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Proposed Six Sigma projects that are not in some way linked to organizational goals:
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Dr. Joseph M. Juran
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lectured in Japan after WWII, was author of several books in the US, is considered an expert in the quality field
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should not be approved
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A project whose definition does not include performance metrics:
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identify the customer
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An important first step in determining the VOC is:
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Quality function deployment is a tool to aid in:
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linking customer requirements to product features
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0.992
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A process produced 1394 units. During this time 11 defects were detected. The rolled throughput yield (RTY) is approximately.
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right skewed
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The x^2 distribution is:
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√2.94 = 1.71
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The mean of a Poisson distribution is 2.94. Its standard deviation is:
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0.008
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Calculate the estimated variance of the population from which the following values have been randomly selected: 2.8, 2.7, 2.6, 2.9, 2.8, 2.8, 2.8
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standard deviation uses information from each measurement
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An advantage of using standard deviation rather than range for measuring dispersion of a large sample is that:
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-0.9
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Data are collected in xy pairs and a scatter diagram shows the points are grouped very close to a straight line that tips down on its right hand end. A reasonable value for the coefficient of correlation is:
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Any symmetric distribution with mode at the axis of symmetry will have mean=median=mode.
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The mean, median, and mode of a distribution have the same value. What can be said about the distribution?
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it varies from 0% to 99% inclusive
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Approximately what percent of the data values are smaller than the mean?
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determine whether the distribution is normal
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A normal probability plot is used to
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eliminating, simplifying, or reducing non-value added activities
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As opposed to earlier emphases, lean manufacturing tends to stress:
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False
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True or False, Work performed by the payroll department is considered value added activity
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reducing the rate for some processes
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In the theory of constraints the "subordinate" step refers to:
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relationship matrix
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A team wants a technique for displaying the connection between various customer needs and various features on a product. They should use:
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right-tail test
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The average yield from a small batch process has been 83%. A new catalyst is available which is designed to increase average yield by at least 5 percentage points. A sample of 45 batches is run with the new catalyst. The average yield of this sample is 90% and the standard deviation of the sample yields is 2.8%. A hypothesis test with α = 0.05 will be used to determine whether the sample data indicate that the new catalyst does increase the average yield by at least 5 percentage points.
This will be a: |
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1.645
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The average yield from a small batch process has been 83%. A new catalyst is available which is designed to increase average yield by at least 5 percentage points. A sample of 45 batches is run with the new catalyst. The average yield of this sample is 90% and the standard deviation of the sample yields is 2.8%. A hypothesis test with α = 0.05 will be used to determine whether the sample data indicate that the new catalyst does increase the average yield by at least 5 percentage points.
The critical value is: |
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cause and effect diagrams
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A team wants a technique for obtaining a larger number of possible reasons for excess variation in a dimension. They should use:
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1.25
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The average yield from a small batch process has been 83%. A new catalyst is available which is designed to increase average yield by at least 5 percentage points. A sample of 45 batches is run with the new catalyst. The average yield of this sample is 90% and the standard deviation of the sample yields is 2.8%. A hypothesis test with α = 0.05 will be used to determine whether the sample data indicate that the new catalyst does increase the average yield by at least 5 percentage points.
The test statistic is approximately: |
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not rejected
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The average yield from a small batch process has been 83%. A new catalyst is available which is designed to increase average yield by at least 5 percentage points. A sample of 45 batches is run with the new catalyst. The average yield of this sample is 90% and the standard deviation of the sample yields is 2.8%. A hypothesis test with α = 0.05 will be used to determine whether the sample data indicate that the new catalyst does increase the average yield by at least 5 percentage points.
The null hypothesis should be: |
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drum
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The word "takt" is closest to the theory of constraints word:
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storming
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The team development stage characterized by expression of individual opinions and ideas often without regard for team objectives is known as:
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help a group reach a consensus
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Nominal group technique is used to:
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going beyond the problem into other problems, failing to cover the entire problem, misunderstanding and disagreement between team members regarding problem boundaries
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A Six Sigma project designed to solve a particular problem needs a definition/scope statement to avoid:
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the decrease in defect occurrence, the decrease in product cost, the decrease in cycle time
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An example of a project metric would be:
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reduces set up time: Single-Minute Exchange of Dies
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SMED is an acronym for activity that:
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a sample statistic is used to estimate a population parameter
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A correct statement about the relationship between the terms "parameter" and "statistic" is:
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events A and B are not disjoint or mutually exclusive
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A and B are events. P(A) = 0.80 and P(B) = 0.90.
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15.5, 16, 18
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Find the mean, median, and mode of the following data set: 9, 11, 12, 12, 14, 18, 18, 18, 20, 23
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1.523
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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.
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0.92
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In a certain sampling situation, α = 0, β = 0.08. The power of the sampling plan in this case is:
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confused correlation with causation
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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:
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reduced cost
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A principle advantage of fractional factorial experimental designs is:
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confounding of effects
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A principle disadvantage of fractional experimental designs is:
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repeating an experiment more than once for a given set of predictor variables
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In an experimental design context, replication refers to:
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5.208
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Find the upper control limit for a range chart if n = 4 and the average range is 2.282.
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the engineer misused the control chart
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An X control chart has been established with control limits of 3.245 and 3.257, n=5. An engineer collects the following sample and plots the average on the control chart:
3.257, 3,256, 3.258, 3.259 |
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a set of problem solving tools which is Russian for Teorija Rezbenija Izobretaltelshih Zadach.
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TRIZ is an acronym which refers to:
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is resistant to varying environmental conditions
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A robust design is one which:
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affinity diagram
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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?
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cause and effect diagram
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A team has been asked to reduce the occurrence of a particular defect. They begin by brainstorming all possible causes using a:
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activity network diagram
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A team wants to make a schedule for a project showing which tasks must be done sequentially and which may be done simultaneously. Which tool is most appropriate?
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process decision program chart
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A complex system has many potential problems and solutions. These may be illustrated on which of the following?
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10, 1, 3
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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:
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27
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A full factorial experiment has three factors. Each factor has three levels. The number of test combinations or runs is:
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9.18%
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A sample of 100 parts has an average of 188 and standard deviation of 6. Assume the population is normally distributed.
What percent of population falls below the lower specification limits? |
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0.56
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A sample of 100 parts has an average of 188 and standard deviation of 6. Assume the population is normally distributed.
Find Cp |
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0.44
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A sample of 100 parts has an average of 188 and standard deviation of 6. Assume the population is normally distributed.
Find Cpk |
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0.75
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Find the least squares regression equation of the type y = mx + b or y = b0 + b1x:
x 6 8 10 y 1 3 4 Find the value of m or b1. |
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; b0 = Y-b1 X = (8/3)-(0.75 x 8) = -3.33
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Find the least squares regression equation of the type y = mx + b or y = b0 + b1x:
x 6 8 10 y 1 3 4 Find the value of b or b0. |
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20
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Run # A B Responses
1 subtraction subtraction 20 2 subtraction addition 30 3 addition subtraction 40 4 addition addition 50 Calculate the main effect of factor A |
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A+ and B+
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Run # A B Responses
1 subtraction subtraction 20 2 subtraction addition 30 3 addition subtraction 40 4 addition addition 50 If is is desirable to maximize the response R, the following levels should be used: |
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u
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Number of scratches 6 5 7 5 6
Sample size 120 110 111 129 110 The appropriate control chart to use is: |
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XmR
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The temperature in a storage location is logged once every 30 minutes. The control chart that is appropriate for displaying these values is:
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np
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A control chart is to be used to display the number of non-conducting diodes in a box of 1000. The appropriate control chart to use is:
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The eight differences are 0.3, 0.1, -0.1, 0.4, 0.5, 0.1, 0.5, and 0.5 and their average is 0.2875
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A team is asked to determine whether printer #2 prints typical company documents faster than printer #1. The team decides to use the paired t hypothesis test. They select eight documents and print each on each printer, assuming that the differences are normally distributed. The results:
Document # Ptr #1 Ptr 2# 1 4.2 3.9 2 5.6 5.5 3 2.8 2.9 4 7.1 6.7 5 11.5 11 6 8.2 8.1 7 12.3 11.8 8 13.5 13 Find the average difference |
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The standard deviation of the sample listed is 0.2295
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A team is asked to determine whether printer #2 prints typical company documents faster than printer #1. The team decides to use the paired t hypothesis test. They select eight documents and print each on each printer, assuming that the differences are normally distributed. The results:
Document # Ptr #1 Ptr 2# 1 4.2 3.9 2 5.6 5.5 3 2.8 2.9 4 7.1 6.7 5 11.5 11 6 8.2 8.1 7 12.3 11.8 8 13.5 13 Find Sd. |
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right tail; the average value for printer #1 exceeds the average value for printer #2
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A team is asked to determine whether printer #2 prints typical company documents faster than printer #1. The team decides to use the paired t hypothesis test. They select eight documents and print each on each printer, assuming that the differences are normally distributed. The results:
Document # Ptr #1 Ptr 2# 1 4.2 3.9 2 5.6 5.5 3 2.8 2.9 4 7.1 6.7 5 11.5 11 6 8.2 8.1 7 12.3 11.8 8 13.5 13 Is this a left-tail, right tail or two tail test? |
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1.895; Use the seventh row
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A team is asked to determine whether printer #2 prints typical company documents faster than printer #1. The team decides to use the paired t hypothesis test. They select eight documents and print each on each printer, assuming that the differences are normally distributed. The results:
Document # Ptr #1 Ptr 2# 1 4.2 3.9 2 5.6 5.5 3 2.8 2.9 4 7.1 6.7 5 11.5 11 6 8.2 8.1 7 12.3 11.8 8 13.5 13 If α = 0.5, what is the critical value? |
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d÷sd/√n
0.2895 ÷ 0.2295/ √8 = 3.57 |
A team is asked to determine whether printer #2 prints typical company documents faster than printer #1. The team decides to use the paired t hypothesis test. They select eight documents and print each on each printer, assuming that the differences are normally distributed. The results:
Document # Ptr #1 Ptr 2# 1 4.2 3.9 2 5.6 5.5 3 2.8 2.9 4 7.1 6.7 5 11.5 11 6 8.2 8.1 7 12.3 11.8 8 13.5 13 What is the value of the test statistic? |
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it is time to recalculate the control limits
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An X-R chart is used to monitor process. One week ago a new type of raw material was introduced, and since that time 60 points have been plotted on the X chart. All are in the middle third of the chart. The corresponding 60 points on the R chart are all below the average range. This indicated that
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the variation in measurements obtained by different people using the same measurement device
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In gage R&R studies, reproducibility refers to:
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