To Clarify... (Score 1)

Actually I am talking about refactoring in this context, a targetted re-write of a core of the application to deliver scalability and stability that the existing 'design' simply doesn't deliver. We are talking about less than 10% re-write, whilst keeping everything that the customer is used to seeing in terms of logs, O&M management etc. However it seems there is little hard evidence to support this process, which to me seems so natural.