Which of these is not one of the assumptions made for the construction of Tabular Cusum charts for the individual measurements?

Which of these is not an assumption made for the construction of the tabular Cusum charts?

A

The selected variable varies on a normal distribution

B

The mean of the normal distribution is available

C

The estimate or the exact value of the standard deviation of the variable

D

The assumptions are very inconsistent with phase II application of SPC

Which of these is true for the Minitab version of tabular cusum charts?

A

\(C_i^-≥0\)

B

\(C_i^-≥9\)

C

\(C_i^-≤0\)

D

\(C_i^-≤5\)

What of these can be used as the decision interval for the tabular cusum charts?

A

2σ

B

1σ

C

5σ

D

4σ

Data for _________ process control can be presented in whichever form in which data is commonly presented for analysis, presentations, and comparison. These tools include bar charts, pie charts, scatter plots to relate two or more variables, Pareto charts, and control charts.

A

Statistical

B

Consistency

C

Variability

D

Lignin

How many ways are there to represent the Cusum on the Cusum charts?

A

3

B

4

C

2

D

5

Which of these is a reason, why the Cusum charts are better than the Shewhart control charts?

A

Because they are having information about only one sample

B

Because the quantity plotted on the Shewhart control charts is variable

C

Because the quantity plotted on the Cusum chart contains information about more than one sample

D

Because the quantity plotted on the Cusum control charts is containing information about a single sample

Various measurements are made on an NMOS amplifier for which the drain resistor RD is 20 kΩ. First, DC measurements show the voltage across the drain resistor, VRD, to be 2 V and the gate-to-source bias voltage to be 1.2 V. Then, ac measurements with small signals show the voltage gain to be −10 V/V. What is the value of Vt for this transistor?

A

0.7V

B

0.8V

C

0.9V

D

1.0V

Various measurements are made on an NMOS amplifier for which the drain resistor RD is 20 kΩ. First, DC measurements show the voltage across the drain resistor, VRD, to be 2 V and the gate-to-source bias voltage to be 1.2 V. Then, ac measurements with small signals show the voltage gain to be −10 V/V. If the process transconductance parameter is 50μA/V2, what is the MOSFET’s W/L?

A

25

B

50

C

75

D

100

Shewhart control charts are better for phase II applications than the Cusum charts.

A

True

B

False

What is analogous to the control limits as in Shewhart control charts, in the cusum status charts?

A

The reference value

B

The allowance value

C

The value of the decision intervals

D

The value of Ci+ and Ci–

Which of these is not one of the assumptions made for the construction of Tabular Cusum charts for the individual measurements?

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