Question 1

A np chart is used for:

Accepted Answer

A)  controlling the number of nonconformities of a product 
B)  controlling the fraction nonconforming in a lot 
C)  cases where there are few opportunities for a nonconformity to occur 
D)  controlling the number nonconforming of a product 
A)  controlling the number of nonconformities of a product 
B)  controlling the fraction nonconforming in a lot 
C)  cases where there are few opportunities for a nonconformity to occur 
D)  controlling the number nonconforming of a product A

Question 2

The first five steps of the control chart process are for:

Accepted Answer

A)  the operators 
B)  the supervisors 
C)  planning 
D)  action 
A)  the operators 
B)  the supervisors 
C)  planning 
D)  action C

Question 3

Trial control limits are calculated based on at least:

Accepted Answer

A)  5 subgroups 
B)  25 subgroups 
C)  15 subgroups 
D)  35 subgroups 
A)  5 subgroups 
B)  25 subgroups 
C)  15 subgroups 
D)  35 subgroups B

Question 4

Determine the trial UCL for a fraction nonconforming chart for May 8 where the trial central line is 0.012. Is May 8 in control or out of control and why? $$\begin{array} { l c c } 
\text { Date } & \text { Number } & \text { Number } \
 & \text { Inspected } & \text { Nonconforming } \
\text { May 7 } & 600 & 11 \
\text { May 8 } & 435 & 28 \
\text { May 9 }& 582 & 6 \
& \square = 10,000 & \square = 120
\end{array}$$

Accepted Answer

UCL = 0.028; p = 0.0

Question 5

A process is in statistical control. Ninety-five pieces are inspected every day and the population percent nonconforming is 7.2%. What is the UCL of a number nonconforming chart?

Accepted Answer

The answer of A process is in statistical control. Ninety-five...

Question 6

The problem of variable subgroup size for a p chart can be minimized by:

Accepted Answer

A)  using an average subgroup size 
B)  changing the product 
C)  changing the production process 
D)  none of these 
A)  using an average subgroup size 
B)  changing the product 
C)  changing the production process 
D)  none of these

Question 7

A u chart measures:

Accepted Answer

A)  the number of nonconforming units 
B)  the count of nonconformities 
C)  the number of standard deviations 
D)  the count of nonconformities/unit 
A)  the number of nonconforming units 
B)  the count of nonconformities 
C)  the number of standard deviations 
D)  the count of nonconformities/unit

Question 8

Which of the following is not a purpose of p charts?

Accepted Answer

A)  to discover the average quality level. 
B)  to discover low spots which may be due to erratic inspection or superior quality. 
C)  to suggest places to use X and R charts 
D)  none of the above 
A)  to discover the average quality level. 
B)  to discover low spots which may be due to erratic inspection or superior quality. 
C)  to suggest places to use X and R charts 
D)  none of the above

Question 9

A p chart is used for:

Accepted Answer

A)  controlling the count of nonconformities in a product 
B)  controlling the fraction nonconforming 
C)  cases where there are few opportunities for nonconformities to occur 
D)  none of these 
A)  controlling the count of nonconformities in a product 
B)  controlling the fraction nonconforming 
C)  cases where there are few opportunities for nonconformities to occur 
D)  none of these

Question 10

The severity problem of a quality characteristic can be minimized by:

Accepted Answer

A)  an alert inspector 
B)  using two-sigma limits 
C)  demerit system 
D)  none of these 
A)  an alert inspector 
B)  using two-sigma limits 
C)  demerit system 
D)  none of these

Question 11

When the lower limit of a c chart is less than zero:

Accepted Answer

A)  change it to 0 
B)  recalculate; an error has been made 
C) leave it alone 
D) use a p chart 
A)  change it to 0 
B)  recalculate; an error has been made 
C) leave it alone 
D) use a p chart

Question 12

Determine the revised central line for a count of nonconformities chart. Assume any out-of-control points have assignable causes. Data not shown are in control. The trial central line is 0.80, the trial UCL is 2.00, and the trial LCL is 0. $$\begin{array} { c c c c } 
\begin{array} { c } 
\text { Lot } \
\text { Number }
\end{array} & \begin{array} { c } 
\text { Sample } \
\text { Size }
\end{array} & \begin{array} { c } 
\text { Count of } \
\text { Nonconformities }
\end{array} & \begin{array} { c } 
\text { Count of non- } \
\text { conformities/unit }
\end{array} \
55 & 5 & 2 & 0.40 \
56 & 5 & 5 & 1.00 \
57 & 5 & 11 & 2.20 \
& & & \
78 & 5 & 3 & 0.60 \
79 & 5 & 0 & 0.00 \
80 & 5 & 4 & 0.80\\square=25 & \square=15 & \square=100
\end{array}$$

Accepted Answer

The answer of Determine the revised central line for a...

Question 13

Determine the trial UCL and trial central line for a count of nonconformities chart for 25 subgroups where the sum of the count of nonconformities is 3827.

Accepted Answer

C = 153.1,

Question 14

Which of the following concerning the p chart is false?

Accepted Answer

A)  it is a variable control chart 
B)  can give an overall quality picture 
C)  can be used for many characteristics 
D)  evaluates the CEO 
A)  it is a variable control chart 
B)  can give an overall quality picture 
C)  can be used for many characteristics 
D)  evaluates the CEO

Question 15

Which of the following concerning the p chart is true:

Accepted Answer

A)  applied to quality characteristics which are variables 
B)  gives a poor overall quality picture 
C)  can be used for many characteristics 
D)  all of the above 
A)  applied to quality characteristics which are variables 
B)  gives a poor overall quality picture 
C)  can be used for many characteristics 
D)  all of the above

Question 16

A fraction nonconforming chart is frequently converted to a percent nonconforming chart:

Accepted Answer

A)  so that employees can understand it better 
B)  because of the difficulty of variable subgroup size 
C)  so that an average subgroup size (n) can be used 
D)  so that the lower control limit will be eliminated 
A)  so that employees can understand it better 
B)  because of the difficulty of variable subgroup size 
C)  so that an average subgroup size (n) can be used 
D)  so that the lower control limit will be eliminated

A np chart is used for:

The first five steps of the control chart process are for:

Trial control limits are calculated based on at least:

Determine the trial UCL for a fraction nonconforming chart for May 8 where the trial central line is 0.012. Is May 8 in control or out of control and why? Date Number Number Inspected Nonconforming May 7 600 11 May 8 435 28 May 9 582 6 \square=10,000 \square=120

A process is in statistical control. Ninety-five pieces are inspected every day and the population percent nonconforming is 7.2%. What is the UCL of a number nonconforming chart?

The problem of variable subgroup size for a p chart can be minimized by:

A u chart measures:

Which of the following is not a purpose of p charts?

A p chart is used for:

The severity problem of a quality characteristic can be minimized by:

When the lower limit of a c chart is less than zero:

Determine the trial UCL and trial central line for a count of nonconformities chart for 25 subgroups where the sum of the count of nonconformities is 3827.

Which of the following concerning the p chart is false?

Which of the following concerning the p chart is true:

A fraction nonconforming chart is frequently converted to a percent nonconforming chart:

Introduction to Quality Improvement

Lean Enterprise

Six Sigma

Statistical Process Control

Fundamentals of Statistics

Control Charts for Variables

Additional Spc Techniques for Variables

Fundamentals of Probability

Acceptance Sampling

Reliability

Management and Planning Tools

Experimental Design

Filters

Exam 9: Control Charts for Attributes

A np chart is used for:

The first five steps of the control chart process are for:

Trial control limits are calculated based on at least:

Determine the trial UCL for a fraction nonconforming chart for May 8 where the trial central line is 0.012. Is May 8 in control or out of control and why? Date Number Number Inspected Nonconforming May 7 600 11 May 8 435 28 May 9 582 6 \square=10,000 \square=120

A process is in statistical control. Ninety-five pieces are inspected every day and the population percent nonconforming is 7.2%. What is the UCL of a number nonconforming chart?

The problem of variable subgroup size for a p chart can be minimized by:

A u chart measures:

Which of the following is not a purpose of p charts?

A p chart is used for:

The severity problem of a quality characteristic can be minimized by:

When the lower limit of a c chart is less than zero:

Determine the trial UCL and trial central line for a count of nonconformities chart for 25 subgroups where the sum of the count of nonconformities is 3827.

Which of the following concerning the p chart is false?

Which of the following concerning the p chart is true:

A fraction nonconforming chart is frequently converted to a percent nonconforming chart:

Introduction to Quality Improvement

Lean Enterprise

Six Sigma

Statistical Process Control

Fundamentals of Statistics

Control Charts for Variables

Additional Spc Techniques for Variables

Fundamentals of Probability

Acceptance Sampling

Reliability

Management and Planning Tools

Experimental Design

Filters