In today's unpredictable markets, companies are feeling the squeeze to achieve more with fewer resources in shorter periods of time. In addition to controlling operational costs, IT is looking to increase the value of information to make the business more profitable. So, necessity to complete and develop projects with changeable requirement ,short period of time ,easily to manage risk , adaptability to changing market requirements has become undeniable main principles for each organization ‘s approach .While traditional methodologies or heavy weight with huge bulk of documentation and long term for planning and designing significantly affects the speed of developing process and customer satisfaction. Hence, using innovative methods for building project are important matter which has introduced in the recent years. Light weight methodologies evolve to meet changing technologies and new demands from users in dynamic business environment.
As a result, agile methodologies and practices emerged as an explicit attempt to more formally embrace higher rates of requirements change.
Agile development methodologies claim to go a step further in overcoming the limitations of traditional one and coping with high speed and high changes on relationships with customers and responsiveness to changes of business processes.
This paper is an evaluation of the agile development methodologies. Furthermore, it includes a discussion about the critical success factors of the agile methodologies, reasons for its failure. A case-study gives a real-world success story.