Instructional Systems Design

Re Instructional Design Systems - Five View of the Field (Shiffman) it seams to me that each model builds on the previous. The Media View focuses on media selection, which need to be done and then the Embyonic View on media production, a natural progression. At some point the content becomes important and does so in the Narrow Systems View where sequencing of content is paramount. Needs assessment and evaluation are left out of the three previous, but emerge in the Standard Systems View which represents generally current ISD theory.  Has the development of ID been that linear?  Perhaps these "views" were the dissertation of a doctoral student and then became the "theory."  Regardless, it is interesting to see the components of instructional design segmented in multiple ways and I think leads to better crtiical thinking when the realities of a design problem are presented.