Our company has recently received a few customer complaints that its candles are not lasting the minimum 50 days previously advertised by the company. As the newly hired quality analyst you are planning to construct control charts that will give you a sense of the current status of the production process. To this end you have collected samples from 20 production batches. Use Microsoft Excel with answer based on both x̄-chart and R-chart plots -Is the candle production process in control? -What is your comment regarding the customer complaints? -Is there any scope of improvement? Use Microsoft Excel with answer based on both x̄-chart and R-chart plots
Our company has recently received a few customer complaints that its candles are not lasting the minimum 50 days previously advertised by the company. As the newly hired quality analyst you are planning to construct control charts that will give you a sense of the current status of the production process. To this end you have collected samples from 20 production batches. Use Microsoft Excel with answer based on both x̄-chart and R-chart plots -Is the candle production process in control? -What is your comment regarding the customer complaints? -Is there any scope of improvement? Use Microsoft Excel with answer based on both x̄-chart and R-chart plots
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...
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Question
Our company has recently received a few customer complaints that its candles are not lasting the minimum 50 days previously advertised by the company. As the newly hired quality analyst you are planning to construct control charts that will give you a sense of the current status of the production process. To this end you have collected samples from 20 production batches.
Use Microsoft Excel with answer based on both x̄-chart and R-chart plots
-Is the candle production process in control?
-What is your comment regarding the customer complaints?
-Is there any scope of improvement?
Use Microsoft Excel with answer based on both x̄-chart and R-chart plots
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Batch # | Sample 1 | Sample 2 | Sample 3 | Sample 4 | Sample 5
1
61.2
60
58.8
60
60
2
54
56.4
84
55.2
43.2
3
60
37.2
57.6
42
74.4
4
66
84
60
36
61.2
5
58.8
45.6
76.8
43.2
56.4
6
52
49
48
64.8
76.8
7
43.2
39.6
58.8
57.6
67.2
8
60
80.4
63.6
51.6
48
9
52.8
62.4
55.2
56.4
52.8
10
84
54
60
56.4
49.2
68.4
64.8
74.4
54
43.2
67.2
64.8
56.4
50.4
65
48
84
69.6
54
52.8
62.4
55
48
62.4
55.2
68.4
50.4
62.4
69.6
61.5
74.4
58.8
50.4
39.6
66
48
42
56.5
55
48.8
76.8
60
50.4
68.4
60
69.6
63.6
62.4
57.6
60
62.4
60
49.2
49.2
60
111213
14
151611112
17
18
19
20
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