The data in Figure 15.11 are the same as the data in Figure 15.12. Figure 15.11 shows columns of sterile data that before meaning can be extracted, must be subjected to hare work at someone's desk. Assuming it does get translated int meaningful information, it will probably still remain invis ible to the people who could make the best use of it-th operators. That can, of course, be overcome by more har work, but in most cases, the data will languish. On the othe hand, Figure 15.12 provides a simple check sheet into which the data are entered more easily and, once entered, provid a graphic presentation of performance. If the check sheet re veals that the machine is creeping away from the center c the range or if the histogram shape distorts, the operator ca react immediately. No additional work is required to trans late the data to useful information, and no additional work required to broadcast the information to all who can use it. To set up a check sheet, you must think about your objec tive. In this example, we were making shafts to a specification We wanted data indicating how well the machine was pen forming, a graphic warning whenever the machine started te deviate, and information about defects. Setting up the chec sheet as a histogram provided all the information needed This is called a Process Distribution Check Sheet because it concerned with the variability of a process. Other commonh used check sheets include Defective Item Check Sheets (de tailing the variety of defects), Defect Location Check Sheet CHECK SHEETS Shaft Length: Week of Length 7/11 (Spec: 1.120-1.130) Check Sheet Date Date Length Date Rem The check sheet (see Figure 15.12) is introduced here as the hird of the seven tools. The fuel that powers the total quality ools is data. In many companies, elaborate systems of people, nachines, and procedures exist for the sole purpose of col- ecting data. At times, this quest for data has become zealous o the point of obscuring the reason for data collection in the irst place. Many organizations are literally drowning in their wn data, while at the same time not knowing what is actu- illy going on; they are "data rich and information poor." With he advent of powerful desktop computers, information col- ection has become an end unto itself in many instances. Having access to data is essential. However, problems arise when trivial data cannot be winnowed from the impor- ant and when there is so much of it that it cannot be easily ranslated into useful information. Check sheets help deal vith this problem. Length Shaft Length: Week of 7/11 (Spec: 1.120-1.130") 11 1.124 1.128 1.128 11 11 1.123 ........ 11 1.126 11 11 1.125 1.118* 13 11 1.119 11 1.123 11 1.122 1.119 11 ** Out of Limits 11 1.120 11 1.122 11 1.123 12 1.124 12 1.126 1.127 1.124 1.124 1.125 12 1.125 1.125 1.120 11 13 12 12 12 13 1.125 1.121 1.126 1.123 12 12 12 1.121 12 13 15 15 12 1.125 12 13 12 1.127 1.122 11 11 13 14 14 15 15 15 13 1.121 1.123 11 11 11 13 13 13 14 15 15 15 13 1.120 13 1.122 13 1.118 13 11 12 12 12 13 13 14 14 14 15 15 15 1.124 1.126 13 1.123 1.123 13 13 1.125 1.124 1.124 13 13 1.125 11 12 12 12 12 13 13 14 14 14 1.125 14 1.127 14 1.124 14 1.126 11 12 12 13 14 14 1.126 1.126 14 1.129 1.123 14 1.125 1.124 14 14 14 1.127 12 12 14 15 14 1.122 14 1.124 14 1.122 1.128 11 11 15 15 1.124 15 15 1.121 1.127 15 1.123 1.123 1.124 15 1.129 14 1.124 1.123 Enter day of month for data point. 15 15 1.122 1.122 15 1.122 1.130 The check sheet can be a valuable tool in a wide variety of applications. Its utility is restricted only by the imagination of the person seeking information. The check sheet can take any form. The only rules are that data collection must be the equivalent of entering a check mark and that the displayed data must be easily translated into useful information. For ex- ample, it may take the form of a drawing of a product with the situations, that would be appropriate. After all, computers Results check marks entered at appropriate places on the drawing to are good at digesting raw data and formatting the result for 15 15 15 1.121 1.131** FIGURE 15.11 Weekly Summary of Shaft Dimensional 1.132** Tolerance Results. Note: This is not a check sheet. FIGURE 15.12 Check Sheet of Shaft Dimensional Tolerance
The data in Figure 15.11 are the same as the data in Figure 15.12. Figure 15.11 shows columns of sterile data that before meaning can be extracted, must be subjected to hare work at someone's desk. Assuming it does get translated int meaningful information, it will probably still remain invis ible to the people who could make the best use of it-th operators. That can, of course, be overcome by more har work, but in most cases, the data will languish. On the othe hand, Figure 15.12 provides a simple check sheet into which the data are entered more easily and, once entered, provid a graphic presentation of performance. If the check sheet re veals that the machine is creeping away from the center c the range or if the histogram shape distorts, the operator ca react immediately. No additional work is required to trans late the data to useful information, and no additional work required to broadcast the information to all who can use it. To set up a check sheet, you must think about your objec tive. In this example, we were making shafts to a specification We wanted data indicating how well the machine was pen forming, a graphic warning whenever the machine started te deviate, and information about defects. Setting up the chec sheet as a histogram provided all the information needed This is called a Process Distribution Check Sheet because it concerned with the variability of a process. Other commonh used check sheets include Defective Item Check Sheets (de tailing the variety of defects), Defect Location Check Sheet CHECK SHEETS Shaft Length: Week of Length 7/11 (Spec: 1.120-1.130) Check Sheet Date Date Length Date Rem The check sheet (see Figure 15.12) is introduced here as the hird of the seven tools. The fuel that powers the total quality ools is data. In many companies, elaborate systems of people, nachines, and procedures exist for the sole purpose of col- ecting data. At times, this quest for data has become zealous o the point of obscuring the reason for data collection in the irst place. Many organizations are literally drowning in their wn data, while at the same time not knowing what is actu- illy going on; they are "data rich and information poor." With he advent of powerful desktop computers, information col- ection has become an end unto itself in many instances. Having access to data is essential. However, problems arise when trivial data cannot be winnowed from the impor- ant and when there is so much of it that it cannot be easily ranslated into useful information. Check sheets help deal vith this problem. Length Shaft Length: Week of 7/11 (Spec: 1.120-1.130") 11 1.124 1.128 1.128 11 11 1.123 ........ 11 1.126 11 11 1.125 1.118* 13 11 1.119 11 1.123 11 1.122 1.119 11 ** Out of Limits 11 1.120 11 1.122 11 1.123 12 1.124 12 1.126 1.127 1.124 1.124 1.125 12 1.125 1.125 1.120 11 13 12 12 12 13 1.125 1.121 1.126 1.123 12 12 12 1.121 12 13 15 15 12 1.125 12 13 12 1.127 1.122 11 11 13 14 14 15 15 15 13 1.121 1.123 11 11 11 13 13 13 14 15 15 15 13 1.120 13 1.122 13 1.118 13 11 12 12 12 13 13 14 14 14 15 15 15 1.124 1.126 13 1.123 1.123 13 13 1.125 1.124 1.124 13 13 1.125 11 12 12 12 12 13 13 14 14 14 1.125 14 1.127 14 1.124 14 1.126 11 12 12 13 14 14 1.126 1.126 14 1.129 1.123 14 1.125 1.124 14 14 14 1.127 12 12 14 15 14 1.122 14 1.124 14 1.122 1.128 11 11 15 15 1.124 15 15 1.121 1.127 15 1.123 1.123 1.124 15 1.129 14 1.124 1.123 Enter day of month for data point. 15 15 1.122 1.122 15 1.122 1.130 The check sheet can be a valuable tool in a wide variety of applications. Its utility is restricted only by the imagination of the person seeking information. The check sheet can take any form. The only rules are that data collection must be the equivalent of entering a check mark and that the displayed data must be easily translated into useful information. For ex- ample, it may take the form of a drawing of a product with the situations, that would be appropriate. After all, computers Results check marks entered at appropriate places on the drawing to are good at digesting raw data and formatting the result for 15 15 15 1.121 1.131** FIGURE 15.11 Weekly Summary of Shaft Dimensional 1.132** Tolerance Results. Note: This is not a check sheet. FIGURE 15.12 Check Sheet of Shaft Dimensional Tolerance
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 46P
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Read the pages and make a very brief summary of them with your own words, please. It is what you understand. Don't make copy-paste, please. Mention important parts only. Also, you will put your comments and ideas about the topic. Please don't write item by item. Write the summary in paragraph form.
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