Forward and Backward pass in Network Diagram, critical path, float/slack time

Forward and Backward pass in Network Diagram, critical path, float/slack time

What is the critical path?

A critical path is a path with least amount of slack/float time.

What is float/slack time?

Float/Slack time is the time that an activity can be delayed without delaying the project.

[quads id=1]

When we complete the project through critical path, then it is the longest path as compared to other paths. If any activity is late in the critical path, then it delays all the project. So we need to take care of critical path.

Early Finish = Early Start + Duration

Late Start = Late Finish – Duration

Float/Slack Time = Late Start – Early Start

Activity Predecessor Duration
A 3
 B A 4
 C A 2
D B 5
E C 1
F C 2
G D,E 4
H F,G 3
softtware project management
Figure 1: Predecessor activities and parent activities
Early Start Duration of activity/task Early Finish
Activity/Task
Late Start Duration of activity/task Late Finish
forward pass in project software project management
Figure 2: forward pass in software project management

 

backward pass in software project management
Figure 3: backward pass in software project management
Fazal Rehman Shamil
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