A) affect almost every production process. B) are the many sources of variation that occur when a process is under control. C) when grouped,form a pattern,or distribution. D) are tolerated,within limits,when a process is under control. E) All of the above are true. A) affect almost every production process. B) are the many sources of variation that occur when a process is under control. C) when grouped,form a pattern,or distribution. D) are tolerated,within limits,when a process is under control. E) All of the above are true.

Exam 19: Statistical Process Control

A part that connects two levels should have a distance between the two holes of 4".It has been determined that x-bar and R-charts should be set up to determine if the process is in statistical control.The following ten samples of size four were collected.Calculate the control limits,plot the control charts,and determine if the process is in control.

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Question 1

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The process is out of control because of sample 5 on the x-bar chart.

The specification for a plastic handle calls for a length of 6.0 inches ± .2 inches.The standard deviation of the process is estimated to be 0.05 inches.What are the upper and lower specification limits for this product? The process is known to operate at a mean thickness of 6.1 inches.What are the C_p and C_pk values for this process? Is this process capable of producing the desired part?

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Question 2

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LSL = 5.8 inches,USL = 6.2 inches.C_p is (6.2-5.8)/6(.05)= 1.33.C_pk is the lesser of
(6.2 - 6.1)/(3*0.05)= .67 and (6.1 - 5.8)/(3*0.02)= 2.00;therefore,.67.The process is capable based upon the C_p.However,the process is not centered (based upon its C_pk)and based upon its current center is not producing parts that are of an acceptable quality.

The upper and lower limits for diving ring diameters made by John's Swimming Co.are 40 and 39 cm. ,respectively.John took 11 samples with the following average diameters (39,39.1,39.2,39.3,39.4,39.5 39.6,39.7,39.8,39.9,40).Is the process in control?

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Question 3

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The purpose of an x-bar chart is to determine whether there has been a:

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Question 4

Natural variations:

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Question 5

A process that is assumed to be in control with limits of 89 ± 2 had sample averages for the x-bar chart of the following: 87.1,87,87.2,89,90,88.5,89.5,and 88.Is the process in control?

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Question 6

What is the difference between natural and assignable causes of variation?

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Question 7

The c-chart signals whether there has been a:

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Question 8

Mistakes stemming from workers' inadequate training represent an assignable cause of variation.

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Question 9

A p-chart is appropriate to plot the number of typographic errors per page of text.

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Question 10

The statistical definition of Six Sigma allows for 3.4 defects per million.This is achieved by what C_pk index value?

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Question 11

A lot that is accepted by acceptance sampling is certified to be free of defects.

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Question 12

What is acceptance sampling?

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Question 13

What does it mean for a process to be "capable"?

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Question 14

The steeper an OC curve,the better it discriminates between good and bad lots.

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Question 15

What is the basic objective of a process control system?

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Question 16

The number of late insurance claim payouts per 100 should be measured with what type of control chart?

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Question 17

The number of defects after a hotel room cleaning (sheets not straight,smears on mirror,missed debris on carpet,etc)should be measured using what type of control chart?

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Question 18

________ is variation in a production process that can be traced to specific causes.

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Question 19

The ________ is a quality control chart used to control the number of defects per unit of output.

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Question 20

Showing 1 - 20 of 144

Exam 19: Statistical Process Control

The upper and lower limits for diving ring diameters made by John's Swimming Co.are 40 and 39 cm. ,respectively.John took 11 samples with the following average diameters (39,39.1,39.2,39.3,39.4,39.5 39.6,39.7,39.8,39.9,40).Is the process in control?

The purpose of an x-bar chart is to determine whether there has been a:

Natural variations:

A process that is assumed to be in control with limits of 89 ± 2 had sample averages for the x-bar chart of the following: 87.1,87,87.2,89,90,88.5,89.5,and 88.Is the process in control?

What is the difference between natural and assignable causes of variation?

The c-chart signals whether there has been a:

Mistakes stemming from workers' inadequate training represent an assignable cause of variation.

A p-chart is appropriate to plot the number of typographic errors per page of text.

The statistical definition of Six Sigma allows for 3.4 defects per million.This is achieved by what Cpk index value?

A lot that is accepted by acceptance sampling is certified to be free of defects.

What is acceptance sampling?

What does it mean for a process to be "capable"?

The steeper an OC curve,the better it discriminates between good and bad lots.

What is the basic objective of a process control system?

The number of late insurance claim payouts per 100 should be measured with what type of control chart?

The number of defects after a hotel room cleaning (sheets not straight,smears on mirror,missed debris on carpet,etc)should be measured using what type of control chart?

________ is variation in a production process that can be traced to specific causes.

The ________ is a quality control chart used to control the number of defects per unit of output.

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The statistical definition of Six Sigma allows for 3.4 defects per million.This is achieved by what C_pk index value?