Why fault measures are not commutative and how to interpret the results?

asked 2025-09-10 00:17:21 -0500

angelson's avatar

Hello, I am testing the effect of combining two HVAC faults using the NREL fault measures. I noticed that applying fault A followed by B gives different results than applying fault B followed by A. In other words, the fault measures are not commutative.

How can this behavior be explained? And is there a recommended order for applying multiple fault measures to ensure consistent results?

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