Software development process is about flow
Taylorism* still has strong mental roots in the endings of post-industrial era; hence, many still try to reason about the creation process of software-based business solutions in terms of an old-manufacturing mindset: trying to characterize analysis, design, testing as discrete units for some kind of division of labor. But the concept of flow has started to raise awareness, slowly, in our trade. A blog post by Hamed Ahmadi is an instance of such awareness.
For more serious work about this concept of flow, you could find illuminating this work by Alan Shalloway, et. al., about lean-agile development.
State of the art in the creation process of software-based business solutions is so different, in so many aspects, with respect to mainstream views that we professionals of software development should be reloading or upgrading our critical thinking skills in order to improve our beliefs at the pace of the changing circumstances; otherwise, our job skillset could become obsolete faster than we currently think.
*For a brief mention of Taylorism in the context of software development see the article The New Methodology by Martin Fowler.