Judy Holmes Industries has decided to use a p-Chart to monitor the proportion of defective castings produced by their production process. The control limits on these charts will be designed to include 95%95% of the sample proportions when the process is In Control. The operations manager randomly samples 400400 castings at 1616 successively selected time periods and counts the number of defective castings in the sample.
Table
Control Chart
Copy Table
Step 8 of 8 :
You, acting as the operations manager, have concluded that the process is "Out of Control". What is the probability that the process is really "In Control" and you have made a Type I Error? Round your answer to three decimal places.
Sample Defects
1 10
2 11
3 8
4 11
5 8
6 11
7 7
8 14
9 9
10 14
11 10
12 9
13 12
14 7
15 7
16 10
Judy Holmes Industries has decided to use a p-Chart to monitor the proportion of defective castings produced by their production process. The control limits on these charts will be designed to include...
The J H group's assembly unit has decided to use a p-Chart to monitor the proportion of defective castings produced by their production process. The control limits on these charts will be designed to include 97% of the sample proportions when the process is In Control. The quality control manager randomly samples 200 castings at 10 successively selected time periods and counts the number of defective castings in the sample. Sample Defects 1...............7 2...............12 3...............8 4...............14 5...............8 6...............9 7...............8 8...............8...
Smith and Johnson Industries has decided to use a p-Chart with 3-sigma control limits to monitor the proportion of defective galvanized pipes produced by their production process. The quality control manager randomly samples 150 galvanized pipes at 16 successively selected time periods and counts the number of defective galvanized pipes in the sample. Step 1 of 8: What is the Center Line of the control chart? Round your answer to three decimal places. Step 2 of 8: What value of...
Quasar Exports Ltd, a fictional Turkish manufacturer of glass, wants to use a c-chart to monitor the number of defects in the sheets of glass it produces. The company wants to use the chart to address the production problems it is experiencing and use it on an ongoing basis as a monitoring tool. To construct the chart, the company collected data over 5 days by inspecting 30 sheets of glass and recording the number defects per sheet. The data are...
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?...
Construct the appropriate three-sigma control chart for the sample observations listed below. Determine the process standard deviation Observation 1 2 3 4 5 6 7 8 9 10 11 Number Defects per unit 9 4 3 5 6 3 4 2 3 2 3
Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number of defectives in each are shown in the following table: Sample n number of defective items in the sample 1 15 1 2 15 1 3 15 1 4 15 0 5 15 2 6 15 3 7 15 1 8 15 0 9 15 2 10 15 1 a. Determine the p, Sp, UCL and LCL...
Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number of defectives in each are shown in the following table: SAMPLE n NUMBER OF DEFECTIVE ITEMS IN THE SAMPLE 1 15 3 2 15 2 3 15 2 4 15 2 5 15 0 6 15 2 7 15 1 8 15 3 9 15 2 10 15 1 a. Determine the p−p−, Sp, UCL and LCL...
Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number of defectives in each are shown in the following table: SAMPLE n NUMBER OF DEFECTIVE ITEMS IN THE SAMPLE 1 15 2 2 15 0 3 15 3 4 15 3 5 15 3 6 15 1 7 15 3 8 15 2 9 15 0 10 15 3 a. Determine the p−p−, Sp, UCL and LCL...
1. The postmaster of a small western city receives a certain number of complaints each dayabout mail delivery. Construct a control chart with three sigma limits using the following data. Is the process in control? SAMPLE1234567891011121314Number of complaints4101489651213764210
Question pertains to the x-chart part Sample Mean Range 16 8 12 13 6 6 4 15 10 10 11 10 16 13 14 0 14 17 11 12 IU 12 12 11 13 14 12 7 8 13 9 11 14 7 13 15 10 15 Subsequently, samples of size 5 were taken from the process every week for the next 10 weeks. The times were measured and the following results oblained: Sample Mean Range 16 9 17 12...