Chaos Drill and Sustainability Worksheets — Operating Quantum Computers

This appendix provides worksheets for resilience drills and energy-aware operations.

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Chaos Drill and Sustainability Worksheets · Figure 1

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flowchart LR
    Worksheet[Worksheet] --> Run[Run exercise]
    Run --> Review[Review]
    Review --> Backlog[Create backlog items]

Chaos drill worksheet

Illustrative listing · yaml

chaos_drill:
  id: qdrill-YYYYMMDD-NNN
  hypothesis: "If the preferred target is unavailable, jobs fail safe and no invalid claim is produced."
  owner: platform@example.com
  scope:
    tenants: [research]
    targets: [simulator, qpu-a]
    max_jobs_affected: 5
  injection:
    method: provider_adapter_timeout
    start_time: <timestamp>
    duration_minutes: 20
  abort_conditions:
    - safety_alarm
    - unbounded cost growth
    - production tenant affected
  expected_behavior:
    - broker marks target degraded
    - policy blocks hardware-only claims
    - fallback routes simulator-eligible jobs
  metrics:
    - time_to_detect
    - time_to_safe_state
    - invalid_jobs_admitted
    - fallback_success_rate
  review:
    scheduled_at: <timestamp>
    reviewer: sre@example.com

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Chaos drill worksheet · Figure 2

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flowchart TB
    Hypothesis[Hypothesis] --> Injection[Injection]
    Injection --> Abort[Abort conditions]
    Injection --> Metrics[Metrics]
    Metrics --> Review[Review]
    Abort --> Review

Calibration staleness drill

Illustrative listing · yaml

calibration_staleness_drill:
  fixture:
    calibration_age_minutes: 180
    workload_sensitivity: high
  expected_policy_decision: deny
  expected_reason_code: calibration_stale
  evidence_required:
    - blocked_request_record
    - policy_decision_record
    - alert_record

Result-ingest failure drill

Illustrative listing · yaml

result_ingest_failure_drill:
  injected_fault: metadata_store_unavailable
  expected_behavior:
    - raw result retained in staging
    - publication gate blocks claim promotion
    - retry queue created
    - alert emitted

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Result-ingest failure drill · Figure 3

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flowchart LR
    Result[Result] --> Ingest{Ingest available?}
    Ingest -- yes --> Warehouse[Warehouse]
    Ingest -- no --> Staging[Staging]
    Staging --> Retry[Retry queue]
    Retry --> Warehouse

Sustainability worksheet

Illustrative listing · yaml

sustainability_record:
  workload_id: qexp-YYYYMMDD-NNN
  useful_work_unit: valid_shot
  submitted_jobs: 12
  accepted_jobs: 8
  valid_shots: 640000
  invalid_run_count: 2
  classical_compute:
    cpu_hours: 12.4
    gpu_hours: 3.1
  storage:
    raw_gb: 18
    retained_gb: 9
  facility_or_provider_estimate:
    energy_kwh: null
    carbon_kgco2e: null
  notes:
    - provider-specific facility data unavailable
    - report energy proxy separately from measured energy

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Sustainability worksheet · Figure 4

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flowchart TB
    Sustainability[Sustainability record] --> Useful[Useful work unit]
    Sustainability --> Compute[Classical compute]
    Sustainability --> Storage[Storage]
    Sustainability --> Waste[Invalid runs]
    Sustainability --> Estimate[Energy or carbon estimate]

Invalid-work reduction plan

Illustrative listing · yaml

invalid_work_reduction:
  observation: invalid_run_rate_above_threshold
  suspected_causes:
    - weak simulator validation
    - stale target capability records
    - missing admission policy
  actions:
    - add simulator smoke test
    - refresh capability catalog hourly
    - block unsigned QPU jobs
  success_metric: invalid_run_rate
  target: "< 2 percent over 30 days"

Energy-aware scheduling review

Illustrative listing · yaml

energy_aware_scheduling_review:
  workload_class: batch_exploratory
  latency_sensitivity: low
  calibration_sensitivity: medium
  allowed_windows:
    - 2026-04-19T08:00:00Z/2026-04-19T12:00:00Z
  optimization_objectives:
    - minimize_queue_delay
    - minimize_cost
    - avoid_stale_calibration
  not_allowed:
    - changing claim semantics
    - using unapproved fallback target

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Energy-aware scheduling review · Figure 5

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flowchart LR
    Workload[Batch workload] --> Objectives[Objectives]
    Objectives --> Window[Allowed window]
    Window --> Check{Claim semantics preserved?}
    Check -- yes --> Schedule[Schedule]
    Check -- no --> Review[Human review]