Lifetime prediction is a research field and methodological approach focused on estimating the duration of functional life for systems, components, materials, or natural phenomena. It involves investigating and modeling the factors and processes that lead to degradation, failure, or cessation of existence, such as operational stresses, environmental conditions, and intrinsic properties. This analysis provides forecasts critical for ensuring reliability, optimizing operational planning, and understanding temporal dynamics in diverse fields, ranging from the operational lifespan of engineered systems like nuclear reactors to the evolutionary timescales of astrophysical objects like stars.