Term Kind Topic What it is
Delivery versus Maintainability concept Delivery vs Maintainability Shipping faster now by accepting future cost — a legitimate trade when it is deliberate, recorded and repaid.
Expensive-to-Change Core concept Delivery vs Maintainability The small part of a system whose shape is copied into stored data and into other people's code, where a shortcut cannot be repaid locally - so deliberate debt belongs everywhere else.