The Pre-Acceptance Test (PAC): Gateway to Operational Success in EPC Contracts

The Pre-Acceptance Test (PAC) is a critical milestone in Engineering, Procurement, and Construction (EPC) contracts. It signifies the completion of the construction phase and the readiness for operation. Let’s delve into the conduct, importance, and contractual implications of the PAC.


The PAC involves rigorous evaluations to ensure all installations (equipment, systems, or entire plants) align with the technical specifications and operational criteria outlined in the contract. An independent testing agency or the owner (as specified in the contract) conducts the PAC.


This phase is crucial for quality assurance. It verifies that the installation meets all requirements before operational use. A successful PAC triggers the release of the retention amount held by the owner, signifying the contractor’s delivery of a functional and compliant project.


  • Transfer of Risk and Property: The contract should clearly define the moment when risk and ownership of the installation transfer from contractor to owner.
  • Warranty Period: The contract must specify the commencement of the warranty period, protecting the owner from future defects or failures.
  • Liquidated Damages: The contract should clarify if the PAC’s conclusion ends delay-related liquidated damages, indicating the contractor’s completion within the agreed timeframe.
  • Final Payment: The contract should outline the conditions for final payment, typically tied to a successful PAC.
  • Performance Bond Expiry: The terms should clarify when the performance bond expires, ensuring the owner’s protection against contractual non-compliance.
  • Warranty Bond Release: The contract must detail the conditions under which the warranty bond is released, securing the contractor’s warranty commitments.

The PAC is a critical juncture in EPC contracts. It verifies quality, operational readiness, and marks the transition from construction to operation. A well-defined PAC process, along with clear contractual terms, ensures a smooth handover and protects the interests of both owner and contractor.

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