Yes. Först Consulting Group performs forensic invoice and cost audits that compare billed quantities and charges against the work actually in place and the contract’s scope. The methodology reconciles line-item invoices against delivery records, verified installed quantities, and contract terms — for example, tracking wire footage and specialized components billed across multiple invoices against what was physically installed. Where billed quantities materially exceed installed or delivered quantities, the audit documents the discrepancy with source-verified evidence and flags potential overbilling for counsel. Cost accounting can also be framed against termination-accounting provisions (such as AIA-style §11.3 termination clauses) and earned-value analysis to test a competing expert’s overpayment or balance-owed calculations.