Validation is continuous, but continuous does not mean constant. It means validation is driven by change and threat rather than by the calendar. Any material technical or operational change triggers the relevant validation. The absence of internal change does not suspend the obligation, because the threat landscape moves on its own. In stable periods, a T5 program holds a defined baseline cadence justified by active threat monitoring rather than by arbitrary scheduling.
Outcomes
- ·Continuous validation operates across critical systems, triggered by change and sustained by threat monitoring
- ·A minimum validation cadence for stable periods is defined and justified by threat intelligence
- ·Adversary simulation is ongoing and adaptive, with threat intelligence continuously shaping scenarios
- ·Crisis simulations run at least semi-annually with executive and cross-functional participants
- ·Resilience metrics are tracked enterprise-wide, trended, and benchmarked against defined targets
- ·A formal PDCA cycle links validation outcomes to continuous program improvement
Actions
- 01Deploy continuous validation tooling for mission-critical systems, triggered by any material change
- 02Stand up a threat intelligence monitoring function tracking adversary TTPs and emerging attack patterns
- 03Define and document the stable-period minimum cadence, justified by threat intelligence outputs
- 04Build an adaptive adversary simulation program that threat intelligence updates continuously
- 05Run crisis simulations at least semi-annually across technical, executive, and communications functions
- 06Formalize the PDCA cycle: set objectives, execute validation, review with leadership, adjust strategy
Sustainment Criteria
All criteria must be met to hold this level. If any criterion is unmet at reassessment, consider yourself at the previous level.
Continuous validation is active across all critical systems, triggered by change and maintained in stable periods
A threat intelligence monitoring function operates and demonstrably shapes cadence and simulation design
The stable-period minimum cadence is documented, justified by current threat intelligence, and reviewed yearly
Adversary simulation is ongoing, with scenario design updated each cycle
Crisis simulations run at least semi-annually with documented outcomes and verified improvements
PDCA evidence is current: objectives set, validation executed, outcomes reviewed, strategy adjusted
Practitioner note
The line between T4 and T5 is not volume of testing, it is the relationship between testing and change. A T4 organization tests on a schedule. A T5 organization tests because something changed, or because the threat landscape did. Threat intelligence consumption is a functional prerequisite for T5.
Corresponding Governance & Accountability level
G5 Embedded
Organizations often develop these axes at different rates. Compare your position on both.