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W.
Edwards Deming. 1986. Out of The Crisis: 346-354
W. Edwards Deming. 1994. The New Economics: 154-171
Yonatan Reshef
School of Business
University of Alberta
Edmonton, Alberta
T6G 2R6 CANADA
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Day 4 |
TOTALS |
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| Daily Average |
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| GrandTotal |
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GrandMean |
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GrandTotal/24 |
You can use this simulator to perform the red-bead experiment.
Class Activities
Download: Raw Data Table; Control Chart; Formulas
1.
Plot the results on a control chart.
Calculating the control chart's parameters
- The central line on the chart is placed at the average count (GrandMean).
- Calculate Sigma:
Note, 50 is the number of depressions in the paddle (the daily production
of each employee).
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Grand Total = SUM {DailyTotal} |
GrandMean = GrandTotal/24 |
- Calculate the Upper and Lower Control Limits:
- Plot the results (the daily production, the line of grand mean,
and the UCL and LCL).
2. How predictable are the four daily averages
(DailyTotal/6)?
3. What is the relationship between the four daily averages and the ratio of
the red/white beads? Why?
4. What are the characteristics of the production system in the
experiment?
5.
What are the (dis)advantages of such a system?
6.
How can one improve this system?
7.
The
inspectors -- divided responsibility and the hazard of consensus
8.
Provide real-life examples.
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