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Project Management Orientation

Lag and Lead Time in the Forward and Backward Pass  (continued)

Whereas lag time adds to the schedule, lead time subtracts from it.  In the following example, it has been decided that Pour Concrete can start while Mix Concrete is being done.  Again, notice the arrow.  Using the forward pass, 2 days would be subtracted from the EF of Mix Concrete to calculate the ES of Pour Concrete.  The formula is EF - lead time = ES of the next activity.

Using the backward pass in the following example, you would add the 2 days of lead time from the LS of Pour Concrete, 6, to get the LF of Mix Concrete, 8.

Example of Lead Time
1: Getting Started
2: Define the Project Team
3: Team Management
4: Identify and Validate Requirements
5: Create Decomposition Structures
6: Risk Management
7: Project Estimates
8: Project Schedules
9: Change Management
10: Project Control and Execution
Defining the Project
11: Project Management Review
12: Project Closeout
13: Project Management Tool Suite
14: Self-Assessment and Final Exam
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Seven Keys
Case Study
WWPMM
Mentor
Check Point
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