It's already recognized by all of us that many changes are running on the original tender drawing, in construcion projecs,
the contractor,in that case is entiltled to an extension of time thereof, according to the nature of changes (omission or addition)
hereby I attach Time impact analysis of one of the project which I was responsible of it.
My analysis was based on the approved Productivity as per the original approved time schedule of the project, and the effect of the increasing of the tender quantities on the duration of the activities-specifically the critical ones at the change order time-
finally I've incorporated the revised durations of the activities in arevised updated time schedule, to discover the effect of the variation on the completion date of the project.
the difference between the original completion date and the revised updated one directly after the event of variation is to be considered the entitlement of extension of time for the contractor.
Sorry for prolongation of explanation.
password for XLS sheet -----khaled------
I hope that anlysis will be for your benifits.
Any delaration, don't hesitate to ask me.Time Analysis due to revised tender drawings1.zip