3 project network example (AON) Basic Scheduling with AON Networks

Basic Scheduling with A-O-N Networks NETWORK TECHNIQUES... ALTERNATIVE PROJECT REPRESENTATIONS Activity on Arc Activity on Node A-O- A A-O- N Arrow Diagrams Precedence Networks Even

Basic Scheduling

with A-O-N Networks

NETWORK TECHNIQUES

ALTERNATIVE PROJECT

REPRESENTATIONS

Activity on Arc Activity on Node

(A-O- A ) (A-O- N )

Arrow Diagrams Precedence Networks Event Oriented Activity Oriented

Activity, a

i

EXAMPLE – 1 (A-O-N)

JOB PREDECESSOR S DURATIONS (Days)

PROJECT NETWORK EXAMPLE-1

(A-O-N)

b

f

i

3

8

FORWARD PASS FOR EXAMPLE-1

BACKWARD PASS FOR EXAMPLE-1

EARLY & LATE SCHEDULE FOR EXAMPLE-1

CRITICAL PATH FOR EXAMPLE-1

CRITICAL PATH FOR EXAMPLE-1

FLOATS FOR EXAMPLE

Job Total Safety Free Independent

Total Float = LS-ES = LF – EF = 1

Safety float = Total Float – {(Max(LF of

predecessors) – ES)}

= I – (0-0) = I

Free Float = Total Float – {( LF – Min( ES of successors)}

= I –(0-0) = 0

Independent float = Total float – both the latter terms = I- (0+1) = 0

FLOAT COMPUTATIONS FOR ACTIVITY a

FLOAT COMPUTATIONS FOR ACTIVITY c

Total Float = LS-ES = LF – EF = 9

Safety float = Total Float – {(Max(LF of

predecessors) – ES)} = 9 – (3-2) = 8

Free Float = Total Float – {( LF – Min( ES of

successors)} = 9 – (12-12) = 9

Independent float = Total float –both the latter terms = 9-(1+0)= 8

PRECEDENCE DIAGRAMMING

METHODS

Start to Start (SS)

Finish to Finish (FF)

Start to Finish (SF)

Finish to Start (FS)

activities

START TO START LAG (SS)

FINISH TO FINISH LAG (FF)

START TO FINISH LAG (SF)

FINISH TO START LAG (FS)

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