Question 1

For a p-chart,the standard deviation of the proportions is 0.084439.If p is 0.31,then the number of items in each sample is ______.

Accepted Answer

A) There is not enough information to determine the number of items in each sample 
B) 28 
C) 30 
D) 35 
A) There is not enough information to determine the number of items in each sample 
B) 28 
C) 30 
D) 35

Question 2

Dumplings -To-Go (DTG)provides take-out dumplings and noodle dishes to customers at its chain of drive-through restaurants.The target for a customer's waiting time is 3.0 minutes +/− 1 minute.Each month,one of the managers observes the drive-through process and collects a sample of 4 waiting times a day over a 6 day period.The data from one restaurant appears below.If DTG were to construct an X-bar chart from this data,the 3-sigma LCL would be

Accepted Answer

A) 0.00 
B) 1.00 
C) 1.76 
D) 2.82 
A) 0.00 
B) 1.00 
C) 1.76 
D) 2.82

Question 3

Marble Inc.makes countertops from a variety of high-end materials.To monitor the quality of its production processes the company randomly selects one countertop and counts the number of blemishes.The results for ten samples are shown below:   Given the sample information above,the average number of defects per unit for this process would be

Accepted Answer

A) 160 
B) 80 
C) 16 
D) 10 
A) 160 
B) 80 
C) 16 
D) 10

Question 4

Dumplings -To-Go (DTG)provides take-out dumplings and noodle dishes to customers at its chain of drive-through restaurants.The target for a customer's waiting time is 3.0 minutes +/- 1 minute.Each month,one of the managers observes the drive-through process and collects a sample of 4 waiting times a day over a 6 day period.The data from one restaurant appears below.If DTG were to construct an X-bar chart from this data,the centerline would be

Accepted Answer

A) 2.87 
B) 3.70 
C) 3.81 
D) 4.28 
A) 2.87 
B) 3.70 
C) 3.81 
D) 4.28

Question 5

It is possible to have low variation within samples while at the same time having high variation between sample means.

Accepted Answer

A) True 
 B)False

Question 6

Four common types of control charts include all of the following except:

Accepted Answer

A)    -chart 
B) t-chart 
C) p-chart 
D) c-chart 
A)    -chart 
B) t-chart 
C) p-chart 
D) c-chart

Question 7

Tolerances reflect the amount of common cause variation allowed in a process.

Accepted Answer

A) True 
 B)False

Question 8

Dumplings -To-Go (DTG)provides take-out dumplings and noodle dishes to customers at its chain of drive-through restaurants.The target for a customer's waiting time is 3.0 minutes +/- 1 minute.Each month,one of the managers observes the drive-through process and collects a sample of 4 waiting times a day over a 6 day period.The data for one restaurant appears below.Calculate the process capability ratio.Is this restaurant capable of meeting DTG standards?

Accepted Answer

A) yes 
B) no 
C) Cannot be determined from the above information 
A) yes 
B) no 
C) Cannot be determined from the above information

Question 9

When a control chart is first developed,if the process is found to be out of control,

Accepted Answer

A) the control chart can be utilized. 
B) the control chart should not be utilized until more samples are taken, 
C) the process should be examined and corrections made before a new control chart is constructed. 
D) the process should be replaced by a new process. 
A) the control chart can be utilized. 
B) the control chart should not be utilized until more samples are taken, 
C) the process should be examined and corrections made before a new control chart is constructed. 
D) the process should be replaced by a new process.

Question 10

A sequence of sample points that display a pattern is known as a run.

Accepted Answer

A) True 
 B)False

Question 11

Easy Tax is a service company that prepares tax returns.An outside auditor has examined 20 samples each containing one completed tax return.The total number of defects observed over the 20 samples is 200.The standard deviation for the control chart is

Accepted Answer

A) 2.2 
B) 3.2 
C) 3.9 
D) 4.5 
A) 2.2 
B) 3.2 
C) 3.9 
D) 4.5

Question 12

All processes contain a certain amount of variation in their output.

Accepted Answer

A) True 
 B)False

Question 13

Consider a production process that produces batteries.A quality engineer has taken 20 samples each containing 100 batteries.The total number of defective batteries observed over the 20 samples is 200.The centerline for the control chart constructed using z equal to two is

Accepted Answer

A) 0.03 
B) 0.04 
C) 0.05 
D) 0.10 
A) 0.03 
B) 0.04 
C) 0.05 
D) 0.10

Question 14

A company produces electronic components designed to have a collector-emitted voltage of 30 V (volts),with a tolerance of + 0.2 V.The production process has a standard deviation of 0.15 V and a process capability index of 0.4.Then the average collector-emitted voltage of the units produced is ______.

Accepted Answer

A) 29.98 
B) 30.01 
C) 30.02 
D) 30.04 
A) 29.98 
B) 30.01 
C) 30.02 
D) 30.04

Question 15

Process control is achieved by taking periodic samples from a process and plotting the sample points on a chart to determine if the process is within control limits.

Accepted Answer

A) True 
 B)False

Question 16

Marble Inc.makes countertops from a variety of high-end materials.To monitor the quality of its production processes the company randomly selects one countertop and counts the number of blemishes.The results for ten samples are shown below:   Given the sample information above,the UCL using sigma = 3 for this process would be

Accepted Answer

A) 36 
B) 32 
C) 30 
D) 28 
A) 36 
B) 32 
C) 30 
D) 28

Question 17

Which of the following is not a primary purpose of statistical process control?

Accepted Answer

A) to establish control limits 
B) to detect special cause variations 
C) to identify specification limits 
D) to determine when a process is not in control 
A) to establish control limits 
B) to detect special cause variations 
C) to identify specification limits 
D) to determine when a process is not in control

Question 18

Consider a production process that produces batteries.A quality engineer has taken 20 samples each containing 100 batteries.The total number of defective batteries observed over the 20 samples is 200.The LCL for the control chat constructed using two sigma is

Accepted Answer

A) 0.01 
B) 0.04 
C) 0.12 
D) 0.16 
A) 0.01 
B) 0.04 
C) 0.12 
D) 0.16

Question 19

A company randomly selects 100 light bulbs every day for 40 days from its production process.If 600 defective light bulbs are found in the sampled bulbs then the estimate for the average percent defective would be

Accepted Answer

A) 6.667 
B) 0.167 
C) 0.150 
D) 0.250 
A) 6.667 
B) 0.167 
C) 0.150 
D) 0.250

Question 20

XYZ manufacturing has received an order to produce a rod 5 inches in diameter + .04 inch.In sample runs,the machine tool that will be making the rod has been able to produce rods with a mean diameter of 4.99 inches and a standard deviation of 0.011 inch.Which of the following statements is true?

Accepted Answer

A) The process is capable of meeting design spec but is off-center. 
B) The process is capable of meeting design specs and is on-center. 
C) The process in incapable of meeting design specs. 
A) The process is capable of meeting design spec but is off-center. 
B) The process is capable of meeting design specs and is on-center. 
C) The process in incapable of meeting design specs.

For a p-chart,the standard deviation of the proportions is 0.084439.If p is 0.31,then the number of items in each sample is ______.

It is possible to have low variation within samples while at the same time having high variation between sample means.

Four common types of control charts include all of the following except:

Tolerances reflect the amount of common cause variation allowed in a process.

When a control chart is first developed,if the process is found to be out of control,

A sequence of sample points that display a pattern is known as a run.

Easy Tax is a service company that prepares tax returns.An outside auditor has examined 20 samples each containing one completed tax return.The total number of defects observed over the 20 samples is 200.The standard deviation for the control chart is

All processes contain a certain amount of variation in their output.

Consider a production process that produces batteries.A quality engineer has taken 20 samples each containing 100 batteries.The total number of defective batteries observed over the 20 samples is 200.The centerline for the control chart constructed using z equal to two is

Process control is achieved by taking periodic samples from a process and plotting the sample points on a chart to determine if the process is within control limits.

Which of the following is not a primary purpose of statistical process control?

Consider a production process that produces batteries.A quality engineer has taken 20 samples each containing 100 batteries.The total number of defective batteries observed over the 20 samples is 200.The LCL for the control chat constructed using two sigma is

A company randomly selects 100 light bulbs every day for 40 days from its production process.If 600 defective light bulbs are found in the sampled bulbs then the estimate for the average percent defective would be

XYZ manufacturing has received an order to produce a rod 5 inches in diameter + .04 inch.In sample runs,the machine tool that will be making the rod has been able to produce rods with a mean diameter of 4.99 inches and a standard deviation of 0.011 inch.Which of the following statements is true?

Introduction to Operations and Supply Chain Management

Supplement Operational Decision-Making Tools: Decision Analysis

Quality Management

Supplement Operational Decision-Making Tools: Acceptance Sampling

Product Design

Service Design

Processes and Technology

Capacity and Facilities

Supplement Operational Decision-Making Tools: Facility Location Models

Human Resources

Supplement Operational Decision-Making Tools: Work Measurement

Project Management

Supply Chain Management Strategy and Design

Global Supply Chain Procurement and Distribution

Supplement Operational Decision-Making Tools: Transportation and Transshipment Models

Forecasting

Inventory Management

Supplement Operational Decision-Making Tools: Simulation

Sales and Operations Planning

Supplement Operational Decision-Making Tools: Linear Programming

Enterprise Resource Planning

Lean Systems

Scheduling

Filters

Exam 4: Statistical Process Control

For a p-chart,the standard deviation of the proportions is 0.084439.If p is 0.31,then the number of items in each sample is ______.

It is possible to have low variation within samples while at the same time having high variation between sample means.

Four common types of control charts include all of the following except:

Tolerances reflect the amount of common cause variation allowed in a process.

When a control chart is first developed,if the process is found to be out of control,

A sequence of sample points that display a pattern is known as a run.

Easy Tax is a service company that prepares tax returns.An outside auditor has examined 20 samples each containing one completed tax return.The total number of defects observed over the 20 samples is 200.The standard deviation for the control chart is

All processes contain a certain amount of variation in their output.

Consider a production process that produces batteries.A quality engineer has taken 20 samples each containing 100 batteries.The total number of defective batteries observed over the 20 samples is 200.The centerline for the control chart constructed using z equal to two is

Process control is achieved by taking periodic samples from a process and plotting the sample points on a chart to determine if the process is within control limits.

Which of the following is not a primary purpose of statistical process control?

Consider a production process that produces batteries.A quality engineer has taken 20 samples each containing 100 batteries.The total number of defective batteries observed over the 20 samples is 200.The LCL for the control chat constructed using two sigma is

A company randomly selects 100 light bulbs every day for 40 days from its production process.If 600 defective light bulbs are found in the sampled bulbs then the estimate for the average percent defective would be

XYZ manufacturing has received an order to produce a rod 5 inches in diameter + .04 inch.In sample runs,the machine tool that will be making the rod has been able to produce rods with a mean diameter of 4.99 inches and a standard deviation of 0.011 inch.Which of the following statements is true?

Introduction to Operations and Supply Chain Management

Supplement Operational Decision-Making Tools: Decision Analysis

Quality Management

Supplement Operational Decision-Making Tools: Acceptance Sampling

Product Design

Service Design

Processes and Technology

Capacity and Facilities

Supplement Operational Decision-Making Tools: Facility Location Models

Human Resources

Supplement Operational Decision-Making Tools: Work Measurement

Project Management

Supply Chain Management Strategy and Design

Global Supply Chain Procurement and Distribution

Supplement Operational Decision-Making Tools: Transportation and Transshipment Models

Forecasting

Inventory Management

Supplement Operational Decision-Making Tools: Simulation

Sales and Operations Planning

Supplement Operational Decision-Making Tools: Linear Programming

Enterprise Resource Planning

Lean Systems

Scheduling

Filters