Change Management

I'm working on the process of Change Management at our Bank and I was wondering if anyone out there could supply me with any policies or other governing documents I could use as references.

I was surprised to find no references to the subject when I did a search... so, help?

"Change" as in?

"Change Management" as in the process by which changes to a company's Information Technology structure/environment are prepared, approved and implemented. Also known as a part of or at least affiliated with the System Development Life Cycle or SDLC.