Mahdi Karbasian - Department of Industrial Engineering, Maleke-Ashtar University of Technology
Mohsen Cheshm berah - Department of Industrial Engineering, Maleke-Ashtar University of Technology
Mahdi Alimohammadi - Department of Mathematics, Central Tehran Branch, Islamic Azad University
Nasim Sabbagh - Department of Industrial Engineering, Maleke-Ashtar University of Technology

In this article, we first give some definitions and genuine differences between hardware and software. We also discuss a statistical model used here and prove some basically properties. Then, we provide different reliability properties of our case study in a step by step manner numerically and graphically. We also use the CASRE program as a tool in software reliability estimation in some steps.

Software reliability growth modeling, Non-homogeneous Poisson process, Goodness of fit test, CASRE program, Goel-Okumoto model, Newton-Raphson method