1. A project consists of 3 activities, each of which has a variance of 1. The pr
ID: 470684 • Letter: 1
Question
1.
A project consists of 3 activities, each of which has a variance of 1. The project standard deviation is:
A. 1.50
B. 1.00
C. 3.00
D. 0.33
E. 1.73
2.
________ are data-gathering tools that can be used in forming histograms.
A) Affinity diagram
B) Pareto charts
C) Check sheets
D) Scatter plots
E) Control charts
3.
A local university is deciding between three different computer networks. The network servers have a mean time between failure and mean time to repair as shown in the table.
MTBF MTTR
Server A 100 hrs 1 hour
Server B 250 hrs 2 hours
Server C 400 hrs 4 hours
Which server will provide the greatest availability?
Server A
Server B
Server C
No difference between A and B
No difference between B and C
4.
The ________ is used to examine the relationships between variables.
A) scatter diagram
B) process map
C) cause-and-effect diagram
D) Pareto chart
E) control chart
5.
Which of the following is true of nonrandom variation?.
A) It is uncontrollable.
B) It is centered on a mean.
C) It occurs with a somewhat consistent amount of dispersion.
D) It could results from a shift in a process mean.
E) It results in a process that is repeatable.
6.
Process improvement teams have the following scope:
A. local or single department
multiple departments
organization-wide
customer- or region-centered
narrow or broad
7.
Off line experimentation is performed during the ________ phase of Six Sigma.
control
improve
analysis
identification
variation
8.
What is the Taguchi constant for a device that costs $300 to repair and a tolerance of plus or minus 3 mmwith a mean squared deviation from the target of 0.2?
1.33
7500
67500
300
33.3
9.
The R chart is used to monitor the __________ of the process.
A. dispersion
mean
lower limit
D. distribution
parameters
10.
A project manager has calculated the mean duration of her project on its critical path to be 80 days, and the variance as 36. The customer is asking for 90% assurance on the completion date. To provide this assurance the PM should revise the duration to _______days.
85
88
94
81
Please provide answers to each questions thank you.
1.
A project consists of 3 activities, each of which has a variance of 1. The project standard deviation is:
A. 1.50
B. 1.00
C. 3.00
D. 0.33
E. 1.73
2.
________ are data-gathering tools that can be used in forming histograms.
A) Affinity diagram
B) Pareto charts
C) Check sheets
D) Scatter plots
E) Control charts
3.
A local university is deciding between three different computer networks. The network servers have a mean time between failure and mean time to repair as shown in the table.
MTBF MTTR
Server A 100 hrs 1 hour
Server B 250 hrs 2 hours
Server C 400 hrs 4 hours
Which server will provide the greatest availability?
Server A
Server B
Server C
No difference between A and B
No difference between B and C
4.
The ________ is used to examine the relationships between variables.
A) scatter diagram
B) process map
C) cause-and-effect diagram
D) Pareto chart
E) control chart
5.
Which of the following is true of nonrandom variation?.
A) It is uncontrollable.
B) It is centered on a mean.
C) It occurs with a somewhat consistent amount of dispersion.
D) It could results from a shift in a process mean.
E) It results in a process that is repeatable.
6.
Process improvement teams have the following scope:
A. local or single department
multiple departments
organization-wide
customer- or region-centered
narrow or broad
7.
Off line experimentation is performed during the ________ phase of Six Sigma.
control
improve
analysis
identification
variation
8.
What is the Taguchi constant for a device that costs $300 to repair and a tolerance of plus or minus 3 mmwith a mean squared deviation from the target of 0.2?
1.33
7500
67500
300
33.3
Explanation / Answer
1
A project consists of 3 activities, each of which has a variance of 1. The project standard deviation is:
S.D. = square root(1 +1 +1) = 1.73
Correct option E. 1.7
2
________ are data-gathering tools that can be used in forming histograms.
Check sheets collects the frequency of the occurance of particular events. The frequency is then used in forming histogram
Correct option: C) Check sheets
3
A local university is deciding between three different computer networks. The network servers have a mean time between failure and mean time to repair as shown in the table.
MTBF MTTR
Server A 100 hrs 1 hour
Server B 250 hrs 2 hours
Server C 400 hrs 4 hours
Which server will provide the greatest availability?
Availability = MTBF/(MTBF + MTTR)
Availability for server A = 100/(100 + 1) = 0.99
Availability for server B = 250/(250 + 2) = 0.9921
Availability for server C = 400/(400 + 4) = 0.99
Highest availibility is for server B
Correct option: Server B
4
The ________ is used to examine the relationships between variables.
to determine the relationships between two variables scatter plot is used.
Correct Option: A) scatter diagram
5
Which of the following is true of nonrandom variation?.
Nonrandom variation is due to some unexpected variations which is caused due to shift in process mean.
Correct Option: D) It could results from a shift in a process mean.
6
Process improvement teams have the following scope:
Process improvement teams focuses on improveing the business process throughout the organization so that quality is build acros organization.
Correct Option: organization-wide
7
Off line experimentation is performed during the ________ phase of Six Sigma.
During improvement phas e of six sigma, the best alternative solution is implemented at a small scale without changing current process to assess the improvement effect. This is also known as off-line experiments.
Correct Option: B) improve
What is the Taguchi constant for a device that costs $300 to repair and a tolerance of plus or minus 3 mm with a mean squared deviation from the target of 0.2?
Taguchi constant = Cost of repair/variance = 300 / (0.2 x 0.2) = 7500
Corrrect option: B) 7500
9
The R chart is used to monitor the __________ of the process.
R-chart plots the range of the sample values, that is maximum sample value - minimum. Thus, R-chart helps to understand the dispersion of the process
Correct Option: A. dispersion
10
A project manager has calculated the mean duration of her project on its critical path to be 80 days, and the variance as 36. The customer is asking for 90% assurance on the completion date. To provide this assurance the PM should revise the duration to _______days.
For 90% assurance or 0.90 probability of completion, the z-score is 1.28.
Expected duration = z + µ = 1.28 x Sqrt(36) + 80 = 1.28 x 6 + 80 = 87.68 or 88 days
Correct Option: A. 88
1
A project consists of 3 activities, each of which has a variance of 1. The project standard deviation is:
S.D. = square root(1 +1 +1) = 1.73
Correct option E. 1.7
2
________ are data-gathering tools that can be used in forming histograms.
Check sheets collects the frequency of the occurance of particular events. The frequency is then used in forming histogram
Correct option: C) Check sheets
3
A local university is deciding between three different computer networks. The network servers have a mean time between failure and mean time to repair as shown in the table.
MTBF MTTR
Server A 100 hrs 1 hour
Server B 250 hrs 2 hours
Server C 400 hrs 4 hours
Which server will provide the greatest availability?
Availability = MTBF/(MTBF + MTTR)
Availability for server A = 100/(100 + 1) = 0.99
Availability for server B = 250/(250 + 2) = 0.9921
Availability for server C = 400/(400 + 4) = 0.99
Highest availibility is for server B
Correct option: Server B
4
The ________ is used to examine the relationships between variables.
to determine the relationships between two variables scatter plot is used.
Correct Option: A) scatter diagram
5
Which of the following is true of nonrandom variation?.
Nonrandom variation is due to some unexpected variations which is caused due to shift in process mean.
Correct Option: D) It could results from a shift in a process mean.
6
Process improvement teams have the following scope:
Process improvement teams focuses on improveing the business process throughout the organization so that quality is build acros organization.
Correct Option: organization-wide
7
Off line experimentation is performed during the ________ phase of Six Sigma.
During improvement phas e of six sigma, the best alternative solution is implemented at a small scale without changing current process to assess the improvement effect. This is also known as off-line experiments.
Correct Option: B) improve
What is the Taguchi constant for a device that costs $300 to repair and a tolerance of plus or minus 3 mm with a mean squared deviation from the target of 0.2?
Taguchi constant = Cost of repair/variance = 300 / (0.2 x 0.2) = 7500
Corrrect option: B) 7500
9
The R chart is used to monitor the __________ of the process.
R-chart plots the range of the sample values, that is maximum sample value - minimum. Thus, R-chart helps to understand the dispersion of the process
Correct Option: A. dispersion
10
A project manager has calculated the mean duration of her project on its critical path to be 80 days, and the variance as 36. The customer is asking for 90% assurance on the completion date. To provide this assurance the PM should revise the duration to _______days.
For 90% assurance or 0.90 probability of completion, the z-score is 1.28.
Expected duration = z + µ = 1.28 x Sqrt(36) + 80 = 1.28 x 6 + 80 = 87.68 or 88 days
Correct Option: A. 88
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