CPM Longest Path theory is broken under resource leveling - It's use should be banned for Delay Claims in construction jobs.

Another scenario in which Longest Path Theory fails is when financial constraints drive your schedule.

"No ticky, no laundry"

Once again Longest Path Theory breaks down. An outdated theory good for the schedules of the 1960's. Of course schedules of the 1960's with no computer assisted resource leveling, otherwise we shall move back to the 1950's.

If it is so limited then why insist on it?  To make money on it?

Can you tell me what activities are in the Longest Path?

1. What happen if Activity D01 is deleted? What if only delayed?
2. What happens if Activity D02 is deleted? What if only delayed?
3. What happens if Activity 0202 is deleted? What if only delayed?

All these actions either will delay the schedule or worst make it unfeasible if a delivery activity is deleted and not enough bricks are delivered.

While these activities are not linked by logic they are resource dependencies that can change as the work progress and things do not happen as planned.

By making these outdated procedures mandatory the institutions that promote them are favoring a few software interests at the expense of ruling out more advanced models.