Object-oriented requirements to object-oriented design: An easy transition?

In the past 10 years, numerous treatises have been written on both object-oriented requirements techniques and object-oriented design techniques. With our ever growing thirst for simple solutions to our software productivity problems, many proponents of object orientation are describing the transition between object-oriented requirements and object-oriented design as straightforward. The purpose of this article is to analyze the incredible differences between object-oriented requirements and object-oriented design, explain why the transition between them is not and should not be easy, and provide guidance concerning how the transition should be made.