Construct an activity$-$on$-$branch network from the precedence relationships of activities in

the project given in the following Tables.

Also calculate critical path, EST and LFT values for each event and verify floats using

spread sheet. Also check your critical path $($calculated from the network diagram & from

floats spread sheet table$).$

Activity Description Predecessors Duration

A Preliminary design $----3$

B Evaluation of design $----6$

C Contact negotiations $----2$

D Preparation of fabrication plant C $3$

E Final design C $8$

F Fabrication of Product B$,$ E $5$

G Shipment of the Product to owner A$,$ F $7$

H Field inspection of the Product B$,$ E $10$

I Installation of the Product B$,$ E $6$

J Field painting B$,$ E $6$

K Substantial completion D$,$ J $8$

L Punch list items completion G$,$ H $3$

M Commissioning I, K$,$ L $4$