The Ajax manufacturing Co. has received a contract from NASA for the final assembly of a space module for an upcoming mission. A team of engineers has determined the activities, precedence, constraints, and time estimates as in the accompanying table.
Activity Preceding activity Time Estimate (days)
A -------- 30
B -------- 15
C ------- 25
D A 3
E C 7
F B 1
G D,F 5
H D,F 2
I E,F 4
J H,I 10
K G,J 8
Answer the following:
(a) Draw the project network.
(b) Calculate total slacks and free slacks, and interpret their meaning.
(c) Determine the critical path and interpret its meaning.
(d) Construct a Gantt chart and identify scheduling flexibilities.