Layers of Longevity
I imagine a complete system consisting of four layers, each concerned with a particular role and purpose:
- Principles: A set of core values from which can inform subsequent design decisions.
- Guidance: Artifacts of a design process that document how these principles should be enacted.
- Tools: Models and frameworks that help practitioners implement guidance in a meaningful way and interact with any complex systems these define.
- Products: The resulting output of the system, whose use will feed back into the make up of the layers below.