Differences between OOA and OOD?

[Aj Manch]

I think the differences between Analysis and Design are pretty straight forward. But what are the key differences between OOA and OOD? In particular why this analysis is called OOA?
Thanks!

[Desai Sandeep]

Hi,
If we talk in terms of artifacts, most of them in OOA is developed for understanding the requirements rather than implementing it.It is in terms of real-world concepts and how they associate with each other.The major artifacts in this step are Usecases and Conceptual Model
OOD has artifacts, which are focussed towards implementation of the problem domain.Here we talk in terms of software objects not real-time objects.The major artifacts in this step are Collaboration Diagrams and Design Class Model.
Hope this helps,
-- Sandeep