End-of-window (retrospective) validation in TIA with a SRP

Hi guys,

I'm working on a project where the contractor issued a schedule recovery plan (SRP) at the end of a certain window. The contractor had impacted Owner's event into the network to determine their EOT entitlement.

My question is: how do we retrospectively validate the impacted results of the window immediately prior to the issuance of SRP when the end-of-window update is the SRP?

Thanks!