Solve Problems 13-12, 13-13, & 13-16
13-12 Sid Davidson is the personnel director of Babson andWillcount, a company that specializes in consultingand research. One of the training programs that Sid isconsidering for the middle-level managers of Babsonand Willcount is leadership training. Sid has listed anumber of activities that must be completed before atraining program of this nature could be conducted.The activities and immediate predecessors appear inthe following table:
ACTIVITY IMMEDIATE PREDECESSORS
A
B
C
D B
E A,D
F C
G E,F
Develop a network for this problem.13-13 Sid Davidson was able to determine the activity timesfor the leadership training program. He would like todetermine the total project completion time and the critical path. The activity times appear in the follow.follwing table (see Problem 13-12):
ACTIVITY TIME(DAYS)
A            2  
B            5 
C            1
D            10
E            3 
F            6
G            8
             35
13-16 Monohan Machinery specializes in developing weedharvestingequipment that is used to clear small lakes
of weeds. George Monohan, president of MonohanMachinery, is convinced that harvesting weeds is farbetter than using chemicals to kill weeds. Chemicalscause pollution, and the weeds seem to grow fasterafter chemicals have been used. George is contemplatingthe construction of a machine that would harvestweeds on narrow rivers and waterways. The activitiesthat are necessary to build one of these experimentalweed-harvesting machines are listed in the followingtable. Construct a network for these activities.
. . .
ACTIVITIES . IMMEDIATE PREDECESSORS .
A
B
C A
D A
E B
F B
G C,E
H D,F