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Consider the following project network and activity times ( in days ) . Assume that management desires a 1 2 - day project completion time.

Consider the following project network and activity times (in days). Assume that management desires a 12-day project completion time.
Activity
A
B C D E F G
Time 2255622
The crashing data for this project are as follows:
Time (days) Cost ($)
Activity Normal Crash Normal Crash
A 217001100
B 2113001500
C 5323003300
D 5314002000
E 6418003200
F 217001000
G 216001000
Formulate a linear programming model that can be used to assist with the crashing decisions. For negative or subtractive number, use minus sign. Enter "0" if your answer is zero. If constant is "1", it must be entered in the box.
Activity Max Crash Days Crash Cost/Day ($)
A fill in the blank 1
fill in the blank 2
B fill in the blank 3
fill in the blank 4
C fill in the blank 5
fill in the blank 6
D fill in the blank 7
fill in the blank 8
E fill in the blank 9
fill in the blank 10
F fill in the blank 11
fill in the blank 12
G fill in the blank 13
fill in the blank 14
fill in the blank 16
YA + fill in the blank 17
YB + fill in the blank 18
YC + fill in the blank 19
YD + fill in the blank 20
YE + fill in the blank 21
YF + fill in the blank 22
YG
s.t.
fill in the blank 23
XA + fill in the blank 24
YA
fill in the blank 26
fill in the blank 27
XB + fill in the blank 28
YB
fill in the blank 30
fill in the blank 31
XC + fill in the blank 32
YC + fill in the blank 33
XA
fill in the blank 35
fill in the blank 36
XD + fill in the blank 37
YD + fill in the blank 38
XB
fill in the blank 40
fill in the blank 41
XE + fill in the blank 42
YE + fill in the blank 43
XC
fill in the blank 45
fill in the blank 46
XE + fill in the blank 47
YE + fill in the blank 48
XD
fill in the blank 50
fill in the blank 51
XF + fill in the blank 52
YF + fill in the blank 53
XC
fill in the blank 55
fill in the blank 56
XF + fill in the blank 57
YF + fill in the blank 58
XD
fill in the blank 60
fill in the blank 61
XG + fill in the blank 62
YG + fill in the blank 63
XF
fill in the blank 65
fill in the blank 66
XFIN + fill in the blank 67
XE
fill in the blank 69
fill in the blank 70
XFIN + fill in the blank 71
XG
fill in the blank 73
fill in the blank 74
XFIN
fill in the blank 76
YA
fill in the blank 78
YB
fill in the blank 80
YC
fill in the blank 82
YD
fill in the blank 84
YE
fill in the blank 86
YF
fill in the blank 88
YG
fill in the blank 90
All Xi, Yi >=0
What activities should be crashed?
Activity Crash Crashing Cost
fill in the blank 92
day(s) $ fill in the blank 93
fill in the blank 95
day(s) $ fill in the blank 96
Total $ fill in the blank 97
What is the total project cost for the 12-day completion time?
Total Cost = $ fill in the blank 98

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