Q.2.
Activity Duration ES LS EF LF Total Float Free Float Successor Critical activity
A 2 0 4 2 6 4 4 D
B 6 0 0 6 6 0 0 D Critical
C 2 0 4 2 6 4 4 D
D 3 6 6 9 9 0 0 E Critical
E 10 9 9 19 19 0 0 F,G,H Critical
F 2 19 22 21 24 3 3 I
G 5 19 19 24 24 0 0 I Critical
H 4 19 20 23 24 1 1 I
I 2 24 24 26 26 0 0 Critical
Critical Path – B-D-E-G-I and it takes 26 days.
b. Total hours and the hours per person required to complete the work-
Duration – (2+6+2+3+10+5+2+4+2) * 8 = 288 total hours
Hours of Alcides = (2+2+3+2+2) * 8 = 88 hours required to complete the work
Hours of Joan = (6+10+5+4) * 8 = 200 hours required to complete the work
c. Total labor cost and the labor cost per person
Total labor cost = (88 * 45) + (200 * 50) = $13,960
Labor cost of Alcides = 88 * 45 = $3,960
Labor cost of Joan = 200 * 50 = $10,000
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