3 Table 19.6 shows the activities, their durations and precedences for designing, writing and installing a bespoke computer database for a commercial bank headquartered in Singapore. Draw a network diagram (activity-on-node) for the project and calculate the fastest time in which the operation might be completed.

Activity Duration (weeks) Activities that must be completed before it can start 1 Contract negotiation 1 –
2 Discussions with main users 2 1 3 Review of current documentation 5 1 4 Review of current systems 6 2 5 Systems analysis (A) 4 3,4 6 Systems analysis (B) 7 5 7 Programming 12 5 8 Testing (prelim) 2 7 9 Existing system review report 1 3,4 10 System proposal report 2 5,9 11 Documentation preparation 19 5,8 12 Implementation 7 7,11 13 System test 3 12 14 Debugging 4 12 15 Manual preparation 5 11