The Value of Microsoft Dynamics Sure Step: Beyond implementation standards
Veteran ERP consultants understand how to execute an implementation project. They can call on their years of experience to design a new project that will have a good chance at success. And when the next generation of consultants joins the team, those practices are passed along, even if there is no process in place to manage the knowledge transfer. Many implementation consultants can probably recall their own experience learning "the way it was always done" at their early jobs.
Consulting companies can apply their own implementation methodology based on previous projects, and there is no problem with that as long as the company achieves its objectives and satisfies its customers. And the company should also be committed to continuously improving its own methodology and building on it by experience.