Network Programming Dr f Dejahang (BSc CEng, BSc (Hons) Construction Mgmt, MSc, EX MCIOB EX........ PhD

1. NETWORK
PROGRAMMING
helpdesk@construction-productivity.co.uk
htt://www.construction-productivity.co.uk

2. NETWORK PROGRAMMING
PTN=PROJECT NETWORK
TECHNIQUE
TWO FAMILIES
ACTIVITY ON NODE EG and
ACTIVITY ON ARROW A.O.A

3. NETWORK PROGRAMMING
A DUMMY IS USED –IT IS ALWAYS SHOWN AS
DOTTED LINE
Total Float
The total amount by which an activity can be extended or
delayed without affecting the total project time (TPT)
Calculation
Latest Time Finish Event (LTFE) – Earliest Time Start
Event (ETSE) –Duration
Or
The total amount by which an activity can be extended or
delayed without affecting succeeding (subsequent)
activities or the Total Project Time.

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Building up a network
 The time flow from left to right
 The start and end of each activity has an
event
 Activities are shown by arrows activity on
arrow networks
 Events are given numeric or ALFA
numeric number to identify

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 Head node numbers are higher than tail node
numbers
 Tail node is known as ‘I’ number
 Head nude is known as ‘j’ number
 Together they are shown as I J
 An event is a point where activities start or
end.
 All activities terminating at an event must be
completed before the next activity starts.

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Network Programming
The steps in producing a network are:
A) Listing the activities
B) Producing a network showing the logical relationship
between activities
c) Assessing the duration of each activities
D) Determining the start and finish times of each
activities and the available float
E) Determining the resources required
F) Produce the schedule

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Ask yourself
1) Which activity must be completed
before the next activity can start?
2) Which activity can not start until this
activity is complete?
3) Which activities have no logical
relationship with this activity and can not
start at the same time?

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Prepare a Network Diagram for the above
project and reduce the duration of the
project by at least 5 weeks.

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