Many of the web agencies claim to work with the agile methodology. We will not look deeply into this project management philosophy because many different books or articles have already covered this topic. I will give you a few headlines on how to optimize your working process with different case studies.
Why are the agile methods more adapted for extension development on Magento? The answer is obvious if we consider that the only alternate solution is the Waterfall model. Many researchers have shown the limits of the antique Waterfall model through statistical reviews. Indeed, in modern project management history, the Waterfall method highlights a high failure rate (for more information, refer to Scaling Software Agility, Dean Leffingwell, 2007). Basically, the Waterfall model has disastrous consequences in the case of scope changing (and it's highly likely that it will happen in your projects). The entire project will be affected if only one task is blocking...