PLEASE SHOW ALL WORK FOR CALCULATIONS: 1) A project consists of 3 activities, ea

Question

PLEASE SHOW ALL WORK FOR CALCULATIONS:

1) A project consists of 3 activities, each of which has a variance of 1. The project standard deviation is:

2) ________ are data-gathering tools that can be used in forming histograms.

3) Reliability models assume statistical independence between failure events. This means:

A) components can fail one at a time

B) if one component fails, the entire system fails

C) If components are parallel, they don’t fail

D) the failure of one component does not influence another to fail

E) Components have to be in series to avoid system reliability.

4) The ________ is used to examine the relationships between variables.

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) Off line experimentation is performed during the ________ phase of Six Sigma.

7) What is the Taguchi quality loss for a device that costs $500 to repair and a tolerance of plus or minus 0.5 mm with a mean of squared deviations from the target of 0.75?

8) A project manager has calculated the mean duration of her project on its critical path to be 80 days, and the variance as 27. The customer is asking for 90% assurance on the completion date. To provide this assurance the PM should revise the duration to _______days.

7) What is the Taguchi quality loss for a device that costs $500 to repair and a tolerance of plus or minus 0.5 mm with a mean of squared deviations from the target of 0.75?

8) A project manager has calculated the mean duration of her project on its critical path to be 80 days, and the variance as 27. The customer is asking for 90% assurance on the completion date. To provide this assurance the PM should revise the duration to _______days.

Explanation / Answer

1- Variance of Project =1+1+1=3 hence project std dev = sqrt(3)=1.73

2-Check sheets

3-the failure of one component does not influence another to fail

4-Inferential tests/statistics

5- D-It could results from a shift in a process mean

6- Improve phase

7-

8- z value at 90% assurance=1.28

hence revised duration = mean+1.28*Sd=80 +1.28*sqrt(27)=86.65

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