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R Charts and Quality

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The following are quality control data for a manufacturing process at Kensport Chemical Company. The data show the temperature in degrees centigrade at five point in time during a manufacturing cycle. The company is interested in using control charts to monitor the temperature of its manufacturing process. Construct the R chart. What conclusions can be made about the quality of the process?

Sample

R Sample

1 95.72 1.0 11 95.80 0.6
2 95.24 0.9 12 95.22 0.2
3 95.18 0.8 13 95.56 1.3
4 95.44 0.4 14 95.22 0.5
5 95.46 0.5 15 95.04 0.8
6 95.32 1.1 16 95.72 1.1
7 95.40 0.9 17 94.82 0.6
8 95.44 0.3 18 95.46 0.5
9 95.08 0.2 19 95.60 0.4
10 95.50 0.6 20 95.74 0.6

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Solution Summary

In this solution we look at a statistical data set to perform a product quality analysis. It includes an Excel and Word formatted explanation and solution.

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Solution

From the given data,
= 95.398
= 0.665
For sample size, n = 5, we have A2 = 0.577, D3 = 0 and D4 = ...

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