In book "Software Project Management" by Bob Huges on Chapter 3: Project Planning, it describes an approach called "Stepwise Project Planning" in contrast to PRINCE2 approach which was developed in UK as a government standard for information system projects.
There is a good history about PRINCE2 which can be read on Wikipedia or prince2.com.
What I am curious about is: Where did Stepwise approach come from. who developed it and how it is different? I read some articles on web but there is no clear answer to that.