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TABLE 1. SAMPLE SIZE AND DESCRIPTIVE STATISTICS FOR CALCULATED COST GROWTHS BY WBS ELEMENT
Standard Deviation
Interquartile Range
Element
Sample Size
Mean
Median
Cost Data
51
1.86
1.49
0.94
0.89
32
1.10
0.85
0.85
1.46
Fee
25
1.37
1.14
0.86
0.39
PME
56
2.05
1.59
1.29
1.05
SE
31
1.77
1.03
1.66
1.43
SEPM
50
2.20
1.58
1.60
1.77
ST&E
51
1.88
1.67
1.21
0.90
Training
23
1.07
0.85
0.81
0.43
Note. PME = Prime Mission Equipment; SE = Support Equipment; SEPM = Systems Engineering and Program Management; ST&E = System Test and Evaluation; WBS = Work Breakdown Structure.
TABLE 2. PEARSON’S CORRELATION COEFFICENTS BETWEEN CALCULATED COST GROWTHS BY LEVEL 2 WBS WBS Element Data PME SE SEPM ST&E Training Data 1.0 0.28 0.51 -0.04 0.56 0.15 PME 0.28 1.0 0.34 0.73 0.53 0.57 SE 0.51 0.34 1.0 0.52 0.86 0.17 SEPM -0.04 0.73 0.52 1.0 0.43 0.53 ST&E 0.56 0.53 0.86 0.43 1.0 0.29 Training 0.15 0.57 0.17 0.53 0.29 1.0
Note. PME = Prime Mission Equipment; SE = Support Equipment; SEPM = Systems Engineering and Program Management; ST&E = System Test and Evaluation; WBS = Work Breakdown Structure.
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Defense ARJ , Spring 2025, Vol. 32 No. 1
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