Robustness Principle
This principle governs system design, delegation, and decision-making.
Definition
A robust system:
- tolerates error
- fails softly
- degrades predictably
- does not require heroics to sustain
Fragile systems appear efficient until stressed.
Design Implications
Prefer:
- simple over clever
- explicit over implicit
- boring over brittle
Assume:
- people will misunderstand
- conditions will change
- attention will lapse
Design accordingly.
Human Systems
In human systems, robustness means:
- clear interfaces
- documented intent
- visible state
- recoverable mistakes
If a system depends on constant vigilance, it is already failing.
Rule
Design so that normal human behavior does not break the system.
Last substantive revision: 2025-05-24
Next review: after first failure