Software reliability is defined as running a system without any failure for a particular time interval. Predicting software reliability is a research issue due to many challenges in predicting and estimation of software reliability. To make the system more efficient and less error, less maintenance, there is need of predicting and estimating software reliability by applied recent techniques and methodologies. The system may become more suitable for combining other factors affecting reliability with reusability. The research is going on to reduce complexities and failure rate in the system. It is a difficult task to compute the best cost where there is a large area with a population with the random movement of many components. Component-Based Software Development (CBSD) helps in making reliability model in easy and efficient manner. It is a difficult task to make a new system in more efficient manner and in very less time interval. Therefore, CBSE may be used to make new software to save time and money by providing quality and high reliability. Goulão (Goulão, 2005) defines CBSE as a section of software engineering that depends on component re-usability. A software component formed a component model by integration of various components for performing a particular function. The components can be separately positioned and compiled without a change in attributes as per composition standard. Thus ComponentBased Software Reliability (CBSR) depends on interaction among reusable components. CBS relies on connections of components. If the connectivity of components is complex, then it is difficult to estimate CBSR. The choice of components depends on interfaces between components and reusability of components. These selected components assist in components integration. Soft computing becomes popular in the research area of estimating and predicting reliability. Many optimization techniques have been used that can help in providing best local/global cost to achieve the target. It is a difficult task to make a new system in more efficient manner and in very less time interval. Therefore, CBSE may be used to make new software to save time and money by providing quality and high reliability. A software component formed a component model by integration of various components for performing a particular function. The components can be separately positioned and compiled without a change in attributes as per composition standard. Thus CBSRe depends on interaction among reusable components. CBS relies on connections of components. If the connectivity of components is complex, then it is difficult to estimate Component-Based Software Reliability (CBSRe). The choice of components depends on interfaces between components and reusability of components. These selected components assist in components integration.