Method / twelve layers
Every layer has a job, owner, control and evidence.
The model is one layer. The system is the full accountable path around it.
EAIS / system view
Signal → system
Human control / on
Architecture record
Twelve accountable layers
The examples below describe the stable control method. Scenario-specific inputs and failure paths are demonstrated in the Interactive System Trace on Home.
- 01
Business / Technical Process
Process owner
Define the operational boundary before automation begins.
ControlNamed trigger, scope, stop condition, and accountable process owner.
- 02
Data / Documents / Signals
Data steward
Register source, provenance, access boundary, and usable payload.
ControlSource allowlist, schema checks, access policy, and provenance capture.
- 03
AI Capability
AI engineering
Apply only the model capability required by the process.
ControlCapability boundary, model policy, confidence threshold, and fallback.
- 04
Prompt / Agent Logic
System designer
Turn capability into versioned operating logic.
ControlVersioned instructions, tool allowlist, constraints, and test fixtures.
- 05
Software Architecture
Software engineering
Place the candidate inside reliable software boundaries.
ControlTyped contracts, isolation, timeouts, idempotency, and error handling.
- 06
Integration
Integration owner
Resolve system-of-record context without uncontrolled write access.
ControlLeast privilege, read/write separation, credential scope, and retries.
- 07
Workflow
Operations owner
Route the candidate through owners, exceptions, and service rules.
ControlExplicit states, assignment rules, deadlines, and exception routes.
- 08
Validation
Validation owner
Test the proposed result before any operational action.
ControlDeterministic rules, eval criteria, exception thresholds, and evidence pack.
- 09
Human Approval
Designated approver
Reserve the consequential decision for an accountable person.
ControlApprove, Reject, or Escalate only; no automatic release or silent default.
- 10
Deployment
Release owner
Execute only the approved action inside a controlled boundary.
ControlApproval token, write scope, idempotency, rollback path, and release receipt.
- 11
Monitoring
Service owner
Observe execution, outcome, exceptions, and service health.
ControlHealth signals, exception alerts, service thresholds, and incident route.
- 12
Continuous Improvement
Process and product owner
Close the loop with reviewed evidence, not autonomous self-modification.
ControlHuman-owned review, versioning, regression tests, and controlled release.