Common z values
Common z values
|Confidence Level (%) |z value |
|90 |1.65 |
|95 |1.96 |
|96 |2.05 |
|97 |2.17 |
|98 |2.33 |
|99 |2.58 |
Factors for control limits of mean and range charts
|Sample Size |A2 |D3 |D4 |
|4 |0.73 |0 |2.28 |
|5 |0.58 |0 |2.11 |
|6 |0.48 |0 |2.00 |
|7 |0.42 |0.08 |1.92 |
|8 |0.37 |0.14 |1.86 |
|9 |0.34 |0.18 |1.82 |
|10 |0.31 |0.22 |1.78 |
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Total cost = Fixed cost + variable cost
Revenue = unit selling price x quantity
Control limits for x-bar charts:
Control limits for x-bar charts using sample range:
Control limits for range charts:
Control limits for proportion charts:
Control limits for count charts:
Process capability measures:
Utilization rates:
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Expected activity time =
Earliest start time = Max [Earliest finish time of all immediate predecessors]
Earliest finish time = Earliest start time + Activity time
Latest finish time = Min [Latest start time of all immediate successors]
Latest start time = Latest finish time - Activity time
σp =
Crash cost per time period =
The Standard Normal Distribution
This table gives the area under the standardized normal curve from 0 to z, as shown by the shaded portion of the following figure.
Examples: If z is the standard normal random variable, then
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| |
|z |
|0.0 |
|Source: Adapted from Robert Markland, Topics in Management Science, 3rd ed. New York: John Wiley & Sons, 1989. |
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