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TOPIC: Critical path and lead/lag

Critical path and lead/lag 2 years 7 months ago #21402

  • Neha Talavdekar
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Can you please confirm if my understanding is correct ?

1. Addition of Lag on Critical path can increase the critical path duration (critical path remains same).
2. Addition of Lag on non-critical path can make this new non-critical path -> critical path (critical path changes)
3. Addition of Lead on critical path can make critical path -> non-critical path. (Another path in the n/w may now have longest duration)
4. Addition of Lead on non-critical path has no effect on current critical path.

For achieving fast tracking (schedule compression) to achieve project deadline one can use
1. Lead
2. Removal of discretionary dependency

Critical path and lead/lag 2 years 7 months ago #21554

  • Devin
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#1: Correct, because the critical path typically has zero float.
#2: CAN (but doesn't have to). It could be ANOTHER critical path (you can have more than one).
#3: CAN (but doesn't have to).
#4: Correct. You are just increasing the float.

#1-2: You can also use fasttracking and crashing.

Crashing - increases costs (more people / overtime).
Fastracking - increases risks (we are painting and laying carpet at the same time)
Resource Smoothing - (adjusting resources so nobody is working over say 85% productivity).
Resource Leveling - adjust start / finish dates to adjust resource supply with demand (** can cause critical path to change)
Last edit: by Devin.
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