Vol. 11, Issue 5, Part C (2025)

Abstract
There are various criteria on which the performance of a reliability model depends. There are 2 kind of reliability models Markovian and Non Markovian. Non Markovian models remember the past data. For example as we see in Google chrome, Myntra, Spelling check softwares where the past data and choices are used to attract the next choice making a loop of thinking cycle. Our brain also functions like that, its development is like that it remembers the past events and experiences and behave accordingly and take future decisions accordingly. Non Markovian models are good as they are reliable. This paper discusses the factors and the tables that allow us to choose the best model according to our objectives.