Question: Control Charts
Magnum Magnetics makes induction meters used in vending machines to test the validity of coins. Their specifications require the induction reading capability of the meters to fall between 0.25 and 0.50 Tesla (T) units. Quality analysts took a random test readings of 30 meters (shown below).
Using Microsoft Excel or similar software with statistical capability, construct a run chart from the individual readings.
Interpret what the data show. Does the process appear to be in control?
What might be some possible causes of different out-of-control indicators?
The two YouTube videos will assist you in creating control charts using Microsoft Excel®.
How To...Draw a Basic Control Chart in Excel 2010
Creating a Basic Control Chart
Data Readings
| 1 |
0.39 |
| 2 |
0.38 |
| 3 |
0.33 |
| 4 |
0.36 |
| 5 |
0.43 |
| 6 |
0.37 |
| 7 |
0.34 |
| 8 |
0.34 |
| 9 |
0.44 |
| 10 |
0.37 |
| 11 |
0.42 |
| 12 |
0.35 |
| 13 |
0.39 |
| 14 |
0.33 |
| 15 |
0.37 |
| 16 |
0.36 |
| 17 |
0.39 |
| 18 |
0.36 |
| 19 |
0.41 |
| 20 |
0.35 |
| 21 |
0.4 |
| 22 |
0.35 |
| 23 |
0.35 |
| 24 |
0.38 |
| 25 |
0.42 |
| 26 |
0.41 |
| 27 |
0.4 |
| 28 |
0.35 |
| 29 |
0.37 |
| 30 |
0.33 |
PLEASE USE THE REQUESTED REFERENCE BELOW
REFERENCE
Evans, J., & Lindsay, W. (2011). Managing for quality and performance excellence (8th ed.). Mason, OH: CH 12 and CH 13