DLA Technical Compliance: First Article Testing (FAT) vs. Production Lot Testing (PLT)

In the world of Defense Logistics Agency (DLA) contracting, technical compliance is the non-negotiable threshold for entry. Two of the most critical checkpoints in the procurement cycle are First Article Testing (FAT) and Production Lot Testing (PLT). Understanding the distinction between these two can be the difference between a successful contract execution and a costly default.

What is First Article Testing (FAT)?

FAT is a requirement designed to ensure that a contractor can manufacture a product that meets all technical specifications before full-scale production begins. It is typically required for new contractors, items with known manufacturing difficulties, or when there has been a long gap since the last production run.

• Focus: Process verification and initial quality.
• Timing: Pre-production phase.
• Responsibility: Can be Contractor Testing (FAT-C) or Government Testing (FAT-G).

What is Production Lot Testing (PLT)?

PLT, on the other hand, is conducted during the actual production run. Its purpose is to ensure that the quality demonstrated during the FAT phase is maintained throughout the entire batch. PLT samples are selected at random from the production lot.

• Focus: Consistency and ongoing quality assurance.
• Timing: During or after the production of a specific lot.
• Requirement: Often triggered by specific "Critical Application Items" (CAI) or "Critical Safety Items" (CSI).

Key Technical Compliance Checkpoints

When reviewing your DLA solicitation, look for the following codes and clauses:

• FAT Clause: FAR 52.209-3 or 52.209-4.
• PLT Clause: Usually found in the "Section E - Inspection and Acceptance" part of the contract.

Failure to account for the costs and lead time associated with FAT/PLT—such as laboratory fees and potential delays in government approval—is a common pitfall for industrial suppliers.