Hi Every one,
Quick question. I have received a Time Impact Analysis from the Contractor who has used Baseline Schedule to show the impact of a delay which he thinks has been caused by the Owner. However, the project schedule has already gone through two (2) updates and Contractor has made a number of sequencing (logic) changes which were not contested (was accepted) by us. Now the question is should'nt the Contractor be using the latest update to show impact of the Owner activity delay as the plan has changed and agreed upon?
I will appreciate an early response if possible as I am in the middle of analysing their claim.
Best Regards
Meraj Zia
Hi C Andre
It appears that you are describing a rolling windows analysis which is acceptable for work in progress if you are reporting to the US Corps of Engineers.
It does not work in forensic analysis.
Mike Testro
the latest approved schedule just before the impact is the one that should be used.
you could also have the contractor update the schedule to the point right before the impact if you want, but the update should be carefully examined, then approved.
Hi Mahmooud
That is one of the reasons why you should never use a progressed programme as a baseline.
Why should a contractor take unfair advantage from his own delays.
Best regards
Mike Testrp
Hi Meraj,
the contractor should have used the latest approved as-built,
using the as-planned in most cases is not on the contractor side because the acivities total float in the as-planned is still intact and not consumed accordingly the resultant EOT will be less than that if he used the latest As-built schedule.
Thanks once again Mike.
Best Regards
Meraj Zia
Hi Meraj
The latest APPROVED programme should be used to impact delays provided you have an original version with no progress on it.
If the event impact is downstream of the progressed tasks then no further adjustment is needed.
If however the event impacts in the progressed section then all progress should be removed and the data date set earlier than the the start date.
I have removed your duplicate threads.
Best regards
Mike Testro
My apologies, my computer and/or website was too slow to response, I might have pushed save button several times resulting in recording of same message repeadtedly. Once again sorry for inconvenience.
Best Regards
Meraj Zia
Hi Mike,
Thanks so much for providing a clear and consize response.
Elaborating my case further after looking at your response, the latest schedule update contains progress data as well as the changes in the logic and some of the durations etc. However, no rigging of result is being suspected at this point.
1) Will it be okay to ask Contractor to use the latest schedule update to show the impact as this contains our new plan?
2) Or, as I saw in one of the related threads that one could use the orginal baseline, apply impact and compare the impacted activities with the porgressed schedule. In this case (as I understood it) if the impacted activity (of the impacted baseline) overlaps or goes beyond the same activity's date/s in the progressed schedule, then it would indicate that the schedule has in fact been impacted by a given event, if not then it would mean that something else has caused the delay.
Once again I will appreciate your response.
Best Regards
Meraj Zia
Hi Meraj
Usually the last approved programme is used to impact delays - provided that the changes were not made solely to rig the results of the impact and no progress has been added.
Whatever baseline is used the Contractor must also compare the impacted tasks with actual progress on site.
Best regards
Mike Testro