For you file management and organization nerds, a decimal-based categorization system for projects and files.
My first thoughts: admirably complete, high-setup cost, high-maintenance, and unsustainable in the long-term without dedication and understanding of why you’re doing it.
I’ve tried similar systems in the past, when I was younger and wanted to categorize the world, and they collapse under their own weight.
I can see this working in places like design or photo studios, or similar workplaces where the types of jobs, processes, workflows, and handoffs are well-known and routine.
But for my personal digital garden, I prefer to optimize fast filing over fast finding. Text-searching – by filename or file contents or both – via Spotlight or Evernote or Windows Explorer tends to find what I want faster than any system I could cook up.