How IT-Projects really work
There are several different versions of the tree swing cartoon (e.g. "How the Customer explained it"), about the design and development process of virtually anything, but this one really is the best. The project management tree swing cartoon below is famous amongst those who have been engaged in any kind of IT Project. It is very useful as a reminder of what not to do.

How the Customer explained it
What the Project Manager understood
How the Analyst designed it
How the Programmer wrote it
What the Business Consultant presented
How the Project was documented
What Operations installed
How the Customer was billed
How the Solution was supported
What the Customer really needed
Cartoon modified; Source unknown.
Maybe the saying "We'll swing it somehow" has its roots in this topic.