Lessons learned modeling complex systems, outside the domains of computing and the data sciences, into code. Over a decade was spent by enterprises designing s

Lessons learned modeling complex systems, outside the domains of computing and the data sciences, into code. Over a decade was spent by enterprises designing software using Structured Analysis (data-flow modeling) - lessons lost. Functional decomposition as a design methodology lessons learned - forgotten. Data modeling lessons learned - we are all the way back to people proposing stored procedures for logic. Object-oriented modeling - deprecated, unfashionable and obscured by “its about messaging” or “code organization” in a world that supposedly should be entirely functional.