I have a contractor who has met various PBP (Performance-Based Payment) milestones but cannot request payment for the full value because they have not incurred the costs. They are now attempting to submit additional PBP requests as they incur additional costs in an attempt to get the full value of the milestones. I believe they get one bite at the apple. Either request it all when all conditions have been met or request the milestone less the costs, not chew on it each time they incur additional costs. DFARs 252.232-7012, PBP - Whole Contract Basis is in the contract.
On a side note, I believe the milestone values were extremely high and the contractor front loaded their costs from the beginning, but I was met with resistance by the contracting officer to address this.
Am I wrong for not allowing the contractor to keep billing as they incur costs?