Forward and backward passes
- Add the durations along each path in your network
- And hence establish the earliest start (ES) and finish (EF) dates for each activity
- This is known as the "Forward Pass"
- Repeat this operation but working backwards from the last date established in the Forward Pass
- Or from a specified "Required Completion" date
- And hence establish the latest start (LS) and finish (LF) dates for each activity
- This is known as the "Backward Pass"