What does the acronym FPT stand for in commissioning terminology?

• A. Field Performance Test
• B. Final Project Test
• C. Functional Performance Test
• D. Factory Performance Test

Answer: (C)

In commissioning terminology, Functional Performance Test focuses on confirming that the system can perform the functions defined by the design and user requirements under actual operating conditions. This means going beyond just turning equipment on or verifying individual components; it checks the real-world behavior, including the control logic, sequences of operation, interlocks, alarms, and how the system responds to changes in setpoints, loads, and environmental conditions. The goal is to prove the system delivers the intended performance and can operate reliably in the building.

This term is the best fit because it encapsulates both what the system is supposed to do (functions) and how well it does it in practice (performance). Other phrases imply different scopes, such as testing at the factory before installation or only confirming basic installation at the site, without verifying the actual functional performance in the field.