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1. A process in control may produce unacceptable output.

True _ False_

2. Special cause variation may fall within the control limits.

True _ False_

3. A process is capable if the variations fall within the control limits. True _ False_
4. If X bar chart is in control then R chart may be out of control.

True _ False____

5. Control charts are used to determine if there are unexpected changes in the process.

True _ False_

6. For defective unit quality control, an nP chart can be used when the sample size is constant.

True _ False_

7. A standard Six Sigma Process has a 4.5 Sigma performance

True _ False____

8. A process is capable if the process mean exceeds the goal

True _ False_

9. A histogram shows the trendline of a process

True _ False____

10. A Fishbone diagram is used to organize data in categories

True _ False____

B. Please answer the following multiple choice questions (each worth 4 points)):

    1)   Which of the following tools is used to identify process frequency distribution?

A) Matrix diagram
B) Histogram
C) Pareto Chart
D) Check sheets
E) Process map

2) Which of the following tools is used to organize ideas.
A) Matrix diagram
B) Histogram
C) Affinity Diagram
D) Check sheets
E) Process map

    3)  Which of the following tools is used to analyze cycle time

A) Control Chart
B) Fishbone diagram
C) Pareto Chart
D) Process map
E) Root Cause Analysis

    4)  Which of the following is true of common cause variation?

A) It is uncontrollable.
B) It is centered around the mean.
C) It is inherent in the process.
D) All of the above.
E) None of the above

    5)  A true 3 Sigma Process is equivalent to  _________industry standard Sigma Process.

A. 3.4
B. 1.5
C. 3.0
D. 4.5
E. 6.0

C. Please respond to the following questions. Each question is worth 10 points:

1)  97. 

1. Please create a process map for withdrawing cash from an ATM machine as described below:
   Janet needed some cash and walks up to an ATM machine. She inserts her debit card. The machine returns the card and the monitor reads: “could not read the card try again”. Janet recognizes that she has entered the card in the wrong direction. She takes the card and turns it around and insert the card again. The machine keeps the card and the monitor reads: “enter pass code”. Janet enters a 4 digit code. The monitor reads: “ error, try again”.
   Janet enters the code again. The monitor displays: Withdrawal? Yes No
   Janet selects Yes. Displays shows:
   “ $100, $200, $300, $400, $______”.
   Janet selects $200. The machine pushes out 10 $20 bills. Monitor then displays “Receipt? Yes No”. Janet selects No. Monitor displays “Take your cash” .
   The machine returns the card. Display changes to “Thank You”.
   Janet takes the cash and her card and walks away. . 2)
2. A customer relationship manager decided to track customer complaints as part of his ongoing customer satisfaction improvement program. After collecting data for 3 months, their check sheet appears as follows: Type of Problem Frequency
   (number of times)
   Call went to voice mail 18
   Items damaged when received 15
   Literature not in the box 7
   Parts missing 13
   Billing error 6
   Unit not working 2
   Delivery was late 3

Construct a Pareto chart including the cumulative % frequency. What is the cumulative percentage of the two highest priority issues?

3. A Black Belt consultant in the ABC Corporation reported the Sigma Performance of a manufacturing line as 3.1. Using Z score table calculate the % defective units coming off the production line
4. A procurement manager has been tracking delivery performance of her suppliers. Based on the following data

a. Calculate sigma performance of these suppliers using Z Score tables and rank order them
b. Comment on the performance of these suppliers

Supplier A B C
Number of deliveries 25 54 70
Number of late deliveries 3 10 12
.

5. A project manager at Global Design Corporation has collected the following data on the size of software programs and the length of programming time. The company is bidding on a new system that is estimated to consist of 300,000 lines of code. Use the data to find the correlation function of coding time to the program size and estimate the number of days it would take to code the system.

Module Size in 1000 lines of code (KLOC) Number of days to code
1 160 70
2 158 66
3 150 70
4 135 59
5 178 72
6 170 63
7 158 69
8 138 65
9 200 72
10 195 68
11 189 65
12 173 68
13 159 70
14 163 55
15 150 66
16 140 65
17 206 73
18 144 64
19 157 70
20 183 74
21 195 75
22 190 77
23 182 69
24 152 65
25 174 69

6. A project manager has developed the following data on a project tasks and durations by weeks.
   a. Please create an AON diagram, identify the critical path and the expected project duration.
   b. What is the chance of completing the project one week earlier than expected?
   c. The customer has asked for a 99% confidence on the project completion date. Calculate the number of additional weeks the project manager needs to make that commitment. Time estimation in weeks Task Predecessor optimistic Most likely Pessimistic
   A 3 4 5
   B A 1 8 15
   C A 2 4 6
   D A 4 8 12
   E B 7 9 11
   F C,B 2 5 8
   G E,D 6 8 10
   H F,G 4 7 10

Sample Solution

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