Exam 19: Statistical Applications in Quality Management Online

SCENARIO 19-8 Recently, a university switched to a new type of computer-based registration.The registrar is concerned with the amount of time students are spending on the computer registering under the new system.She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering.The range, mean, and standard deviation of the times required to register are in the table that follows. -Referring to Scenario 19-8, an R chart is to be constructed for the time required to register. The center line of this R chart is located at __________.

SCENARIO 19-5 A manufacturer of computer disks took samples of 240 disks on 15 consecutive days.The number of disks with bad sectors was determined for each of these samples.The results are in the table that follows. -Referring to Scenario 19-5, construct a p control chart for these data.

Which of the following is not one of Deming's 14 points?

SCENARIO 19-9 The manufacturer of canned food constructed control charts and analyzed several quality characteristics.One characteristic of interest is the weight of the filled cans.The lower specification limit for weight is 2.95 pounds.The table below provides the range and mean of the weights of five cans tested every fifteen minutes during a day's production. -Referring to Scenario 19-9, an R chart is to be constructed for the weight.The upper control limit for this data set is ________.

SCENARIO 19-5 A manufacturer of computer disks took samples of 240 disks on 15 consecutive days.The number of disks with bad sectors was determined for each of these samples.The results are in the table that follows. -Referring to Scenario 19-5, the process seems to be in control.

The p chart is a control chart used for monitoring the proportion of items that meet given specifications.

SMED establishes ways to eliminate unnecessary housekeeping aspects of a work environment.

Poke-Yoke devices establish ways to clean and maintain the necessary housekeeping aspects of a work environment.

In the United States, the control limits on a control chart are placed so that they are 3 standard deviations above and below a central line.

One of the morals of the red bead experiment is:

Once the control limits are set for a control chart, one attempts to

Treating common cause variation as special cause variation is known as interference.

SCENARIO 19-4 A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds)is too erratic and adversely affects expected profits.The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours.The sample mean and range for each hour are listed below. She also decides that lower and upper specification limits for the critical-to-quality variable should be 10 and 30 seconds, respectively. -Referring to Scenario 19-4, suppose the sample mean and range data were based on 6 observations per hour instead of 5.How would this change affect the lower and upper control limits of an R chart?

Champions is among the tools of Lean Six Sigma.

SCENARIO 19-4 A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds)is too erratic and adversely affects expected profits.The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours.The sample mean and range for each hour are listed below. She also decides that lower and upper specification limits for the critical-to-quality variable should be 10 and 30 seconds, respectively. -Referring to Scenario 19-4, what is the value of the CPL index?

SCENARIO 19-2 A political pollster randomly selects a sample of 100 voters each day for 8 successive days and asks how many will vote for the incumbent.The pollster wishes to construct a p chart to see if the percentage favoring the incumbent candidate is too erratic. -Referring to Scenario 19-2, what is the numerical value of the upper control limit for the p chart?

SCENARIO 19-8 Recently, a university switched to a new type of computer-based registration.The registrar is concerned with the amount of time students are spending on the computer registering under the new system.She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering.The range, mean, and standard deviation of the times required to register are in the table that follows. -Referring to Scenario 19-8, based on the chart, it appears that the process is in control.

Quick Changeover Techniques establish ways to eliminate unnecessary housekeeping aspects of a work environment.

The R chart is a control chart used to monitor a process mean.

A process capability is estimated by the percentage of product or service that falls outside the specification limits.