Complex process chart attempts to document the creative process, where design is considered a recursive activity.
When we iterated in a Design Process, it is actually a refinement activity where one evolution gives way to the next evolution. However when developing a design, especially when the design is complex, a simple iteration does not deal with the myriad of other different factors that could be involved. For example, a choice of a material could change the required draft angle of the wall surface, thereby not allowing one half of a cover to meet another properly. So do you change the material or the form? How would you describe these different levels of design decisions?