Freight Audit and Payment Process

I need to improve our freight audit and payment process. Current situation:

Annual freight spend: [Total transportation costs]
Number of carriers: [Carrier count]
Invoice volume: [Monthly invoices]
Current process: [How freight bills are handled]
Known issues: [Billing errors, duplicate payments]
Payment terms: [Current terms with carriers]
Technology used: [ERP, TMS, manual]
Recoveries/disputes: [Current dispute rate]

Please help create:
1. Freight audit process flow
2. Automated validation rules
3. Exception handling procedures
4. Dispute resolution process
5. Payment optimization strategy
6. Reporting and analytics
7. Carrier scorecard integration