You can't build a stable system without a good plan. And you can't develop a good plan without a strong model that fits the needs of the organization. A coherent vision of how all of a system's parts need to come together that protects you. Without a plan you risk inefficiency, or even chaos, for your organization.

All about architecture...
https://www.skyscrapr.net/default.aspx

see cornie video:
https://www.skyscrapr.net/blogs/video/archive/2006/03/10/46.aspx