STATS 136-A

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"Control Charting Techniques - Statistical Process Control for Short Production Runs - 2".

1. What is the UCL of the standardized R chart for short production runs?

a) D4

b) D5

c) D1

d) D2

2. What is the value of LCL of the standardized R chart for short runs?

a) D4

b) D2

c) D1

d) D3

3. What is the value of standard variable plotted in the standardized x bar chart for short run production?

a)\bar{x}_i^s=\frac{\bar{M}_i-T_j}{2\bar{R}_j}

b)\bar{x}_i^s=\frac{\bar{M}_i+T_j}{\bar{R}_j}

c)\bar{x}_i^s=\frac{\bar{M}_i-T_j}{\bar{R}_j}

d)\bar{x}_i^s=\frac{2\bar{M}_i-T_j}{\bar{R}_j}

4. The standardized x bar chart has the value of LCL when used for short production runs is ____________

a) 3

b) -A2

c) 1

d) A2

5. Which of these has the same difference between the LCL and Center line, and the UCL and the center line?

a) Standardized R chart for short production runs

b) Standardized x bar charts for short production runs

c) Both, standardized x bar and R charts for short production runs

d) Neither one of the standardized R chart and standardized x bar charts for short production runs

6. The termMi, which is used in the expression of the standard variable used in standardized x bar charts for short production runs, is defined as ___________

a) Average of averages of standard deviations

b) Average of original mean measurements

c) Moving average

d) Exponentially weighted moving average

7.Rjis the ____________

a) Target value for range

b) Target value for ratios

c) Result of jth part

d) Ratio of jth part

8. Tjstands for __________

a) Target value for relative range

b) Target value for relative mean

c) target value for x bar for each part number

d) Target value for tested value of the variable

9. Which of these is correct?

a)\bar{R}_j=\frac{Sd_2}{c_4}

b)\bar{R}_j=\frac{Sd_2}{c_2}

c)\bar{R}_j=\frac{Sd_2}{2c_2}

d)\bar{R}_j=\frac{d_2}{c_4}

10. Standardized control chart approach for short production runs was presented by ____________

a) Rodriguez

b) Roberts

c) Crowder

d) Farnum

11. According to Farnum, the coefficient of variation is _____________

a)\frac{}{}

b)\frac{}{}

c)\frac{2}{}

d)\frac{2}{}

12. Which of these is true according to Farnum?

a) The coefficient of the variation should be randomly varying

b) The coefficient of the variation should be systematically varying

c) The coefficient of the variation should be varying, maybe randomly or systematically

d) The coefficient of the variation must be constant

13. Which of these is correct target value for standardized control chart for fraction nonconforming for shorter production runs?

a)p

b) np

c)c

d) R

14. The standardized control chart approach for short production runs can only be applied on variable control charts.

a) True

b) False

15. The DNOM approach does not need the measurements to be taken at all.

a) True

b) False