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A large certified public accounting firm has been monitoring the accuracy of its employees and wishes...
Dave Green, an analyst at Hyvee, shared his forecasts of the daily Tide sales for days...
Dave Green, an analyst at Hyvee, shared his forecasts of the daily Tide sales for days 1 to 15 with you as given in the table below (actual sales for days 1 to 15 is already given to you in question 4 above). Using Dave’s forecasts given below answer the following questions: Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Dave's Forecast 20 27 14 14 8 11 18 15 8 24...
Unit6: OPTIMIZING AND CONTROLLING PROCESSES THROUGH STATISTICAL PROCESS CONTROL 1. Define the concept of statistical process...
Unit6: OPTIMIZING AND CONTROLLING PROCESSES THROUGH STATISTICAL
PROCESS CONTROL
1. Define the concept of statistical process control SPC?
2. What is SPC key element?
3. Solving the following problem (Using x -charts and R
–charts)?
a. Using this data to solve the problem by using X bar chart and
R chart?
b. What is the difference between X bar chart and R chart?
c. Draw the control chart for both X bar chart and R chart?
d. Explain the result?...
A maintenance group improves the effectiveness of its repair work by monitoring the number of maintenance...
A maintenance group improves the effectiveness of its repair work by monitoring the number of maintenance requests that require a second call to complete the repair. Eight weeks of data is shown in the table below. Construct the trial control chart for this process using Minitab from part (a). Is the process in-control (yes or no)? Why? What should be done? Sample Number Sample Size Number Nonconforming 1 100 10 2 100 15 3 100 31 4 100 18 5...
The waiting time for treatment in a "minute-clinic" located in a drugstore is monitored using con...
The waiting time for treatment in a "minute-clinic" located in a drugstore is monitored using control charts for individuals and the moving range. Table 6E.24 contains 30 successive measurements on waiting time. TABLE 6E.24 Clinic Waiting Time for Exercise 6.66 Waiting Waiting Waiting Observation Time Observation Time Observation Time 1.14 22 2.66 4.67 1.54 5.06 3.40 1.39 1.11 6.92 30 36.99 2.49 3.39 741 2.88 0.76 1.32 7.05 1.37 6.17 5.12 21 1.34 12 13 14 15 16 17 4.35...
The Money Pit Mortgage Company is interested in monitoring the performance of the mortgage process. Fifteen...
The
Money Pit Mortgage Company is interested in monitoring the
performance of the mortgage process. Fifteen samples of five
completed mortgage transactions each were taken during a period
when the process was believed to be in control. The times to
complete the transactions were measured. The means and ranges of
the mortgage process transaction times, measured in days, are as
follows:
b.
Sample123456789 10 11 12 13 14 15 Mean 5 103 7 8 13 14 9 9 9 5...
The Goodman Tire and Rubber Company periodically tests its tires for tread wear under simulated road...
The Goodman Tire and Rubber Company periodically tests its tires for tread wear under simulated road conditions. To study and control the manufacturing process, 20 samples, each containing three radial tires, were chosen from different shifts over several days of operation, with the following results. Tread wear measurements are in hundredths of an inch. Sample Tread Wear 1 31 42 28 2 26 18 35 3 25 30 34 4 17 25 21 5 38 29 35 6 41 42...
Elm Street Medical Hospital has the largest emergency room in the city. Because approximately 85% of...
Elm Street Medical Hospital has the largest emergency room in the city. Because approximately 85% of the emergency room visits in the city are handled by Elm Street Medical Hospital, the emergency room is often crowded and the staff work longer hours than advised. The hospital administrators and city officials are concerned about patient care and want to assess the level of service the emergency room is capable of providing its patients. Wait time, the time between when a patient...
4) Now that Continental can detect more defects before the Silver Box is shipped, I decided...
4) Now that Continental can detect more defects before the Silver Box is shipped, I decided process Improvements in its circuit board fabrication department would further improve quality. So, for one process they collected the following data this morning to set up a mean control chart. Since the process mean is unknown, estimate the mean and find the UCL and LCL for a 3-sigma mean control chart using this morning's samples. Sample 1 - 24, 24, 25, 22, 21 Sample...
Please solve and explain steps thanks A sample of 200 ROM computer chips was selected on each of 30 consecutive d...
Please solve and
explain steps thanks
A sample of 200 ROM computer chips was selected on each of 30 consecutive days, and the number of nonconforming chips on each day was as follows: The data has been given so that it can be copied into R as a vecto. #### non.conforming = c(11, 21, 27, 16, 35, 17, 4, 22, 9, 22, 30, 18, 15, 21, 20, 19, 12, 23, 11, 22, 15, 16, 12, 26, 28, 14, 11, 17,...
A printing company has a machine that folds brochures for mailing. Sometimes the machine can have...
A printing company has a machine that folds brochures for mailing. Sometimes the machine can have problems that cause it to do improper folds. To monitor this process, the company selects a sample of 50 brochures from every order and counts the number of incorrectly folded items in each sample. The data are found below. Complete parts a through d. ES Click the icon to view the data. a. What is the appropriate control chart to use to monitor this...
Unit6: OPTIMIZING AND CONTROLLING PROCESSES THROUGH STATISTICAL
PROCESS CONTROL
1. Define the concept of statistical process control SPC?
2. What is SPC key element?
3. Solving the following problem (Using x -charts and R
–charts)?
a. Using this data to solve the problem by using X bar chart and
R chart?
b. What is the difference between X bar chart and R chart?
c. Draw the control chart for both X bar chart and R chart?
d. Explain the result?...
The waiting time for treatment in a "minute-clinic" located in a drugstore is monitored using control charts for individuals and the moving range. Table 6E.24 contains 30 successive measurements on waiting time. TABLE 6E.24 Clinic Waiting Time for Exercise 6.66 Waiting Waiting Waiting Observation Time Observation Time Observation Time 1.14 22 2.66 4.67 1.54 5.06 3.40 1.39 1.11 6.92 30 36.99 2.49 3.39 741 2.88 0.76 1.32 7.05 1.37 6.17 5.12 21 1.34 12 13 14 15 16 17 4.35...
The
Money Pit Mortgage Company is interested in monitoring the
performance of the mortgage process. Fifteen samples of five
completed mortgage transactions each were taken during a period
when the process was believed to be in control. The times to
complete the transactions were measured. The means and ranges of
the mortgage process transaction times, measured in days, are as
follows:
b.
Sample123456789 10 11 12 13 14 15 Mean 5 103 7 8 13 14 9 9 9 5...
Elm Street Medical Hospital has the largest emergency room in the city. Because approximately 85% of the emergency room visits in the city are handled by Elm Street Medical Hospital, the emergency room is often crowded and the staff work longer hours than advised. The hospital administrators and city officials are concerned about patient care and want to assess the level of service the emergency room is capable of providing its patients. Wait time, the time between when a patient...
4) Now that Continental can detect more defects before the Silver Box is shipped, I decided process Improvements in its circuit board fabrication department would further improve quality. So, for one process they collected the following data this morning to set up a mean control chart. Since the process mean is unknown, estimate the mean and find the UCL and LCL for a 3-sigma mean control chart using this morning's samples. Sample 1 - 24, 24, 25, 22, 21 Sample...
Please solve and
explain steps thanks
A sample of 200 ROM computer chips was selected on each of 30 consecutive days, and the number of nonconforming chips on each day was as follows: The data has been given so that it can be copied into R as a vecto. #### non.conforming = c(11, 21, 27, 16, 35, 17, 4, 22, 9, 22, 30, 18, 15, 21, 20, 19, 12, 23, 11, 22, 15, 16, 12, 26, 28, 14, 11, 17,...
A printing company has a machine that folds brochures for mailing. Sometimes the machine can have problems that cause it to do improper folds. To monitor this process, the company selects a sample of 50 brochures from every order and counts the number of incorrectly folded items in each sample. The data are found below. Complete parts a through d. ES Click the icon to view the data. a. What is the appropriate control chart to use to monitor this...
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