Structural reliability analysis is essential for assessing the safety and performance of structures under uncertain loading and environmental conditions. Develop a theoretical exploration of structural reliability principles, encompassing concepts like probability theory, reliability indices, and failure modes and effects analysis $($FMEA$).$ Discuss theoretical models for quantifying structural reliability, such as probabilistic methods and reliability$-$based design codes. Explore theoretical approaches to incorporating uncertainty and variability into structural design and decision$-$making processes, and analyze their role in ensuring robust and resilient infrastructure systems.