project management lecture note 8a1 - project scheduling
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7/28/2019 Project Management Lecture Note 8A1 - Project Scheduling
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Bar or Gantt Charts
Disadvantages
Difficult to show the interrelationships between activities. The representation of the construction sequence may give too simple
picture.
Networks
Advantages
Shows the interrelationships of activities.
Requires the planner to think logically.
Critical activities are identified.
Non-critical activities are identified, this allows the planner to balance
resources requirements. The effect on future activities of a delay on a previous activities can be easily
analyzed.
Effects of delays can be identified and claims by contractor for extension of
time can be substantiated more easily.
Suitable for complex and difficult projects
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Networks
Disadvantages
Not easily understood by all participants to the contract.
Updating and redrafting can be time consuming and difficult. Requires the planner and users to have an expert knowledge of the
construction processes and methods used in the project.
Line of Balance or Linier Scheduling Method
Advantages
Rate of working is clearly shown.
Information is easily understood.
Provides good pictorial representation of construction sequences.
Effect of delays are clearly shown.
Progress can be recorded easily as an aid to monitoring and control.
Requirement dates for materials can be easily identified.
Different rates of output are evident
Effect of accelerating the activities are clearly shown.
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Line of Balance or Linier Scheduling Method
Disadvantages
Suitable only for repetitive works
May give too simple a picture of the construction process as a lot ofinformation is summarized on the chart.
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15900
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Draw the planned S curve
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ES : Early Start
EF : (ES + Duration)
LS : Late Start (LF Duration)
LF : Late Finish
TF : Total Float (LS-ES)Milestone : Activity with zero duration
SS
FS SF
FF
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A : The amount of work carried out at a given time
B : Time taken to complete a given amount of work
C : Lag time between one activity to another
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