Mujtaba Zuhair Ali, Ali Abbas Jabir, Mohammed Abdul Hameed Jassim Al-Kufi, An Estimate of the Reliability of the Rayleigh Distribution in the Reliability Stress Strength Using Bayesian Method and Robustfit Method, Journal of Engineering and Applied Sciences, Volume 14,Issue 3, 2019, Pages 927-930, ISSN 1816-949x, jeasci.2019.927.930, (https://makhillpublications.co/view-article.php?doi=jeasci.2019.927.930) Abstract: In this study using two random variables follows Rayleigh distribution such that X is stress and Y is strength with parameters α and β using different size (n, m). Reliability is estimated using the Bayesian method and Robustfit method of the estimate in samples taken from stress and strength distributions. statistical metrics are used to compare between two methods and to get the best method and from MSE, TD and R2. A small sample of reliability estimates is compared through the Monte Carlo Simulation. Keywords: Rayleigh distribution;stress;strength;reliability is estimated;Bayesian method;Robustfit method