Q4 Analytics Ingestion Service v3.0

Authenticating…

# CAB Review Pack — CHG0030033

**Change:** Q4 Analytics Ingestion Service v3.0
**Business unit:** Software
**Requested by:** unknown
**Decision:** **route_standard_cab** → Standard CAB
**Risk:** medium (score 0.20)
**Generated:** 2026-08-31T11:50:34Z

## Executive summary
CR Q4 Analytics Ingestion Service v3.0 is routed to the standard CAB review with a medium risk score of 0.20. The primary risk drivers are the VETO for Service criticality (raw 1.00 ≥ 0.70 threshold) and the Tier‑1 service scope finding, along with high weighted Service criticality (12 %), Code standards (6 %) and Rollback feasibility (8 %). Key findings include missing dependency manifest, absent declared software versions, lack of post‑abort health checks, insufficient monitoring for the traffic‑shift window, and no backup or snapshot for additive migration.

## Top risk drivers
- VETO: Signal 'Service criticality' raw 1.00 ≥ veto threshold 0.70
- VETO: Finding [high] 'Tier-1 service in scope' (from service_criticality)
- Service criticality (weight 12%, raw 1.00)
- Code standards (weight 6%, raw 0.50)
- Rollback feasibility (weight 8%, raw 0.20)

## Evidence
- **intake** (succeeded, score 0.00): Intake complete: 0 TCR(s), 0 downstream CIs. Type=code_deploy. Historical failure rate raw=0.00 — 0/94 prior code_deploy changes failed.
- **agent_planner** (succeeded, score 0.00): Selected 9 specialist(s): ['code_standards', 'test_coverage', 'security', 'infra_impact', 'backout', 'hardware_compat', 'downtime_impact', 'data_integrity', 'connectivity_impact']. The prose cites code standards, extensive testing, security scans, infra deployment, a back‑out plan, GPU hardware compatibility, additive DB migration, TLS/load‑balancer connectivity, and zero downtime, triggering all nine specialist agents.
- **test_coverage** (succeeded, score 0.10): Description states tests were executed and passed (QA / UAT / regression).
- **security** (succeeded, score 0.00): No security findings detected in SAST, SCA, AV, or secret scans. The deployment is clean.
- **hardware_compat** (succeeded, score 0.00): The change is a pure code deployment with no hardware modifications. All required evidence (PR, tests, back‑out plan) is provided and there are no hardware compatibility concerns.
- **infra_impact** (succeeded, score 0.00): No downstream blast radius and no window collisions; the change is isolated.
- **connectivity_impact** (succeeded, score 0.00): The deployment introduces no new firewall rules, VPC peering, routing, DNS, or segmentation changes. All connectivity aspects (TLS cert, DNS, load‑balancer health checks) remain unchanged, and the only referenced network CI is an existing production DB with no modifications to its access patterns. Therefore there is no connectivity risk.
- **code_standards** (succeeded, score 0.50): The change includes required artifacts (PR link, back-out plan) but lacks a dependency manifest and declared software versions, preventing verification of compliance with approved versions and blacklist constraints.
- **backout** (succeeded, score 0.20): Back-out plan is comprehensive: abort via Argo Rollouts, traffic shift within 60 seconds, additive DB migration is safe, TLS config revert documented, RTO provided, owner and rehearsal noted. Minor cosmetic gaps (e.g., explicit post‑abort validation steps) but no blocking issues.
- **data_integrity** (succeeded, score 0.20): The migration adds two nullable columns and leaves them in place on back‑out, which is low risk. However, the plan does not mention any explicit backup, snapshot, or dual‑write safeguard for the database, which is a minor data‑integrity omission.
- **downtime_impact** (succeeded, score 0.20): The change includes a zero‑downtime blue‑green rollout with a quantified back‑out RTO (≤12 min) and documented traffic rollback, satisfying downtime acknowledgment, redundancy, and impact monitoring. Minor cosmetic concerns only.
- **service_criticality** (succeeded, score 1.00): Highest-criticality CI touched: Tier 1 (customer-critical). prod-crm-db-01
- **change_window** (succeeded, score 0.00): Planned during weekday business hours — no window risk.
- **coordination** (succeeded, score 0.05): No TaskChangeRequests declared — single-team change.
- **arbitrator** (succeeded, score 0.50): [needs_review] The entire routing decision hinges on one signal: service_criticality's raw 1.00 contributes 0.120 of the 0.204 weighted total and is the sole severity veto blocking auto-approval — yet it asserts a Tier-1 CI (prod-crm-db-01, a CRM database) that appears nowhere in the change request. The CR declares CI=n/a, intake found 0 TCRs and 0 downstream CIs, and infra_impact found no blast radius. If that CI attribution is a mis-lookup or stale CMDB link, the weighted score drops to ~0.084 (low band) with no veto, and the correct verdict is auto_approve, not Standard CAB. Conversely, if the additive DB migration genuinely targets prod-crm-db-01, the Tier-1 classification, veto, and Standard CAB routing are exactly right. This is a concrete, band-determinative factual contradiction — not a cosmetic issue — and it should be resolved before the verdict stands. All other specialist scores (code_standards 0.50, backout/data_integrity/downtime 0.20) are internally consistent and none would shift the 

## Back-out plan
Argo Rollouts abort → traffic shifts back to the previous stable
revision in <60 seconds. The additive DB migration is left in place
(safe by design — v2 ignores the new columns). Load-balancer TLS
config is version-controlled; git-revert + reload if the cert change
misbehaves. RTO: 5 minutes end-to-end (canary abort) or 12 minutes
end-to-end (full traffic revert). Owner: Analytics Platform on-call
(PagerDuty rotation). Backout rehearsed in staging on 2026-07-14.

## Audit trace
- intake: 94 ms, in=0/out=0 tokens
- agent_planner: 7574 ms, in=1231/out=412 tokens
- test_coverage: 0 ms, in=0/out=0 tokens
- security: 2847 ms, in=519/out=119 tokens
- hardware_compat: 3154 ms, in=1029/out=150 tokens
- infra_impact: 7372 ms, in=539/out=208 tokens
- connectivity_impact: 9431 ms, in=1044/out=256 tokens
- code_standards: 10651 ms, in=898/out=525 tokens
- backout: 13960 ms, in=815/out=342 tokens
- data_integrity: 16942 ms, in=1148/out=358 tokens
- downtime_impact: 27056 ms, in=1186/out=642 tokens
- service_criticality: 0 ms, in=0/out=0 tokens
- change_window: 0 ms, in=0/out=0 tokens
- coordination: 0 ms, in=0/out=0 tokens
- arbitrator: 48487 ms, in=2423/out=4971 tokens