Good design practice dictates that enhancements integrate seamlessly with the existing software, unless there is an overwhelming justification for being different. When we add new pages or change existing pages, the changes should have the same look and feel as the original pages, unless the new functionality requires significant differences. This consistency not only makes the user's life easier, it makes support, maintenance, and training more efficient.
There will be instances where we will need to create a significantly different page layout in order to address a special requirement. Maybe we will need to use industry-specific symbols, or we will need to create a screen layout for a special display device. Perhaps, we will create a special dashboard display to report the status of work queues. Even when it will be different, we should continue to be guided by the environment and context in which our new work will operate.
