Made as simple as possible, but not simpler.
Data Sharing versus Data Collaboration
Sharing is a way to facilitate concurrency. Collaboration is a way to orchestrate concurrent operations on what is shared.
Worse Is Better, and the Rule of Least Power
There are a number of reasons to punt on power in a design, to go with a worse-is-better style such that you express the design in the least powerful way.
The Materials Paradigm and Epochal Time
The materials paradigm1 may be represented in the form of a tetrahedron2, illustrating a set of material concerns and how they are interrelated.
Shaping Up With Sequence Diagrams
A sequence diagram can serve as a fat-marker sketch of a happy-path checklist for a spike.