Network Analysis prob-5

Activity	Predecessor
A	-
B	-
C	AB
D	B
E	A
F	C
G	EF
H	DF
I	GH
J	I

AB

A & B starts from  1st node; They start from same nodes, and both A & B are repeated, therefore two dummies are required (1) one from A to new node (2) one from B to new node

EF

E starts from A & G starts from EF;They start from different nodes, and F is repeated,therefore dummy is required from F to E.

DF

D starts from B & F starts from C;They start from different nodes, and F is repeated,therefore dummy is required from F to D.

GH

G starts from EF & H starts from DE;They start from different nodes, and there is no repetition of either G or H,therefore head of G&H should be merged