Methodology is a tough topic. There are good methodologies, there are bad methodologies, there are good methodologies gone bad. Methodology is not a silver bullet, it won’t just make any problems disappear, and is hardly ever the single source of success or failure. But a methodology can be a major contributor to success. I could put it this way: you stand much better chances of success if you apply a methodology, then if you don’t. With something as critical as an implementation of business software, methodology is a key success factor. According to Jim Johnson of Standish Group, it’s number nine on their ten identified most important success factors.