The Fallen

Concepts and practices considered for the index and left out. Seeing what was left out shows what the index is for.

Considered and not included:

The Phoenix Project (Kim, novel). The thinking is already carried by Three Ways, DORA, Theory of Constraints, and Improvement Kata. The narrative is good, but the framework is derivative.
The Spotify Model (squads, tribes, chapters, guilds). Spotify themselves moved on from it. People who never worked at Spotify still hold it up. Team Topologies covers the substance better.
Holacracy and Sociocracy. Specific organisational designs. The principles behind them (distributed authority, dynamic roles) are covered by Sociotechnical Systems and Team Topologies. The specific implementations are too prescriptive for an index of ideas.
Beyond Budgeting (Bogsnes, Hope). Strong work on financial governance that adapts to fast delivery. Belongs in a wiki on operating models more than in this index.
Fitts's Law. UX-specific work on how long it takes to move to a target. Too narrow for the index.
Goldratt's Drum-Buffer-Rope. A specific scheduling technique inside Theory of Constraints. Covered by the parent framework.
The Cathedral and the Bazaar (Raymond). Historically important, but its modern descendants earn the space instead.
Composition over Inheritance. A 1990s correction to a 1990s mistake. Useful, but if you start from scratch you do not need the correction.
The Joel Test (Spolsky). A dated, prescriptive checklist of practices. The underlying ideas live in CI, source control, and bug tracking norms, and each is better treated on its own.
Specific cognitive biases (anchoring, availability, and others). Confirmation Bias and Sunk Cost are in. The wider Kahneman and Tversky work belongs in a wiki on decision-making.
Price's Law (the square root of the people do half the work). A bibliometric hypothesis from Derek de Solla Price's work on scientific publications. Studies testing it against author productivity data have not supported it, because the actual distributions are more skewed than the law predicts. It has no rigorous empirical basis in software engineering. It is out because it is unproven.
Putt's Law and the Dilbert Principle. Comic-strip observations about management. Funny, but too thin for the index.
Sturgeon's Law ("90% of everything is rubbish"). A throwaway line from a science fiction writer. Useful as a private assumption, but too thin for an entry.
Zawinski's Law ("every program tries to grow until it can read mail"). A joke.
Law of Unintended Consequences. True, but too general to say anything useful.
Cunningham's Law. A joke about social dynamics.

Concepts join this list when they are considered and left out.