The article discusses how important it is to measure and improve the reliability of software. Software reliability is the likelihood of software working without errors for a specific time in a specific environment. It's hard to achieve because software is complex. There are three main parts to software reliability: modeling, measuring, and improving. By using metrics early on, we can find and fix problems in the requirements, which helps prevent errors later. The best way to ensure software reliability is to create high-quality software throughout its life cycle. The article gives an overview of techniques for measuring software reliability.