Selvarani, RRSelvaraniBharathi, RRBharathi2025-03-212025-03-212017pp. 51-6197833195249179783319524900https://doi.org/10.1007/978-3-319-52491-7_3https://gnanaganga.alliance.edu.in/handle/123456789/5423Focusing on safety attributes becomes an essential practice towards the safety critical software system (SCSS) development. The system should be error free for a perfect decision-making and subsequent operations. This paper presents an analysis on error propagation in the modules through a novel safety metric known as SMEP, which can be characterized depending on the performance rate of the working module. We propose a framework for the analysis of occurrence of error in various modules and the intensity of it is quantified through probabilistic model and universal generating function technique. © Springer International Publishing AG 2017.enError propagationModulesPerformanceSafety criticalUGFBook chapter