##  [First-Order Reliability Method](/first-order-reliability-method) 

  ##  [First-Order Reliability Method](https://engineering.quantumdictionary.io/first-order-reliability-method-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A probabilistic reliability analysis technique that estimates the probability of failure by locating the design (most probable failure) point on the limit‑state surface in a transformed standard-normal space and approximating the limit-state function by its first‑order (linear) Taylor expansion about that point.