Definition
A scale describing how consistently a system can halt, reverse, answer a challenge, and learn from correction, across its lifecycle. Early maturity focuses on stopping acute harms; later stages add controlled degradation, ways to challenge decisions, and routine reviews of maintenance load. Mature systems publish fairness and safety measures, maintain repair capacity, and review their halt, reversal, and challenge metrics on a fixed cadence.
Structural
Tests that show it is in place
- A maturity level is documented with evidence for each capability and reviewed after major releases.
- Maintenance and repair staffing, budgets, and tools are recurring, not ad hoc.
Hypothetical example
- A rail operator publishes service-level justice metrics, runs quarterly halt drills, and funds dedicated repair staffing.
References
- Maintenance guidance · Guide
- Maintenance playbooks · Resource