Software development model is the way that software development is organized and managed, which has a direct effect on the quality of software development. It is also one of the most significant topics of research in software engineering. It is necessary to take into account the software development process as well as its various phases in order to assure that the objectives are met effectively. Software engineering is concerned with the application of software systems to various system processes. Agile is a method of software development that emphasizes flexibility before its needed and pragmatic methods for delivering a final product. Agile software development requires a change in the way many organizations do things because it focuses on clean delivery of individual software parts instead of whole solution. Agile is an iterative approach to the management of projects as well as development of software. It makes it possible for teams to give value to customers more rapidly and with fewer complications than is possible with old methods. A “big bang” release is something an agile team strives to steer clear of in favor of smaller, more manageable components of work. First, deliver a quick introduction to the agile software development concepts. In this problem, lack of communication and collaboration among team members: Agile methodology relies heavily on communication and collaboration among team members. However, this can be challenging for teams that are geographically dispersed or have members working in different time zones. Afterward discussed different software development techniques including two techniques waterfall model and spiral model, agile software development, agile methodologies. After that, challenges in agile risk management and software risk have been discussed.