Cost Allocation, Measurement & Accountability
1 · Purpose
Give customers full visibility into AWS spend—down to individual workloads and business metrics—so they can optimize, budget, and hold teams accountable.
2 · Capabilities Overview
| Requirement (per checklist) | How ZirconTech Enables It |
|---|---|
| Filter / group costs by org, account, resource, tag, category, region | • Enable AWS Cost Explorer + Cost Categories • Enforce standardized tagging strategy ( CostCenter, Project, Team) • Publish curated Athena views ( vw_ce_daily, vw_ce_monthly) |
| Create unit economics | • Join Cost & Usage Report (CUR) with business KPIs (e.g., requests, MAU) in Athena • QuickSight dashboards show cost per 1 k API calls, per customer, per feature |
| Allocate shared-service costs | • Define allocation rules in Cost Categories (“Shared-Infra”, “LogArchive”) • Pro-rate via Athena query or third-party FinOps tools |
| Granular CUR / usage reporting | • CUR delivered to S3 daily with resource IDs • Glue crawler → Athena tables → QuickSight / Tableau exports |
3 · Methodology & Process
3.1 Discovery
- Workshop with Finance, DevOps, and BU leads
- Identify shared services (logging, VPN, Transit Gateway)
- Gather business drivers for unit metrics (transactions, seats, GB stored)
3.2 Foundation
| Step | Action | Tool |
|---|---|---|
| 1 | Turn on Cost Explorer, CUR (hourly, resource-level) | Billing Console |
| 2 | Implement tagging baseline via SCP + Tag Policies | AWS Organizations |
| 3 | Create Cost Categories (< 50 rules) | Cost Explorer API |
| 4 | Build Glue crawler & partitioned Athena external table | Glue, Athena |
| 5 | Publish initial QuickSight dashboard “All-Up Spend” | QuickSight |
3.3 Unit Economics Pipeline
CUR (S3) ─► Glue Crawler ─► Athena View `vw_cost`
│
Business KPIs (S3 / RDS) ──────────┘
│
└──► Athena View `vw_unit_cost` ─► QuickSight “Cost per KPI”
3.4 Shared-Cost Allocation
- Rule 1 – % Split:
TransitGatewaycost split 40 % Prod, 60 % Non-Prod - Rule 2 – Tag Inherit:
SharedServicesaccount charges distributed byCostCentertag weights - Rule 3 – Fixed Fee: Security tooling charged at flat monthly rate to “Security & Compliance” cost center
Rules implemented in Athena or FinOps SaaS; validation report generated monthly.
3.5 Reporting & Accountability
| Report | Cadence | Audience | Actionable KPI |
|---|---|---|---|
| Exec Summary PDF | Monthly | C-suite | Total AWS spend vs. budget |
| BU Chargeback CSV | Monthly | Finance, BU heads | Cost by CostCenter |
| Unit-Cost Dashboard | Daily | Product owners | $ / 1 k API calls |
| Anomaly Alerts | Near-real-time | FinOps team | >20 % spike YoY or MoM |
4 · Tooling Stack
| Layer | Default AWS Service | Optional / Third-Party |
|---|---|---|
| Cost ingestion | Cost & Usage Report (CUR) | N/A |
| Data lake / query | S3 + Glue + Athena | Databricks, Snowflake |
| Dashboards | AWS QuickSight | Tableau, Power BI |
| FinOps SaaS | — | Third-party FinOps platforms |
| Tag enforcement | Tag Policies, SCPs | Infrastructure as Code validation hooks |
| Anomaly detection | Cost Anomaly Detection, Budgets alerts | Third-party cost management tools |
5 · Roles & Responsibilities
| Role | Key Tasks |
|---|---|
| FinOps Analyst | Maintain tag dictionaries, review anomalies, run chargeback |
| DevOps Lead | Ensure workloads propagate Environment, Project tags |
| Finance Manager | Approve shared-cost allocation rules, reconcile invoices |
| Business Owner | Monitor unit-cost dashboard, drive optimizations |
6 · Deliverables
- Cost Allocation Runbook (Markdown + PDF)
- Tag Dictionary and Cost Category Rule Set (JSON)
- Glue + Athena CloudFormation stack templates
- QuickSight dashboard link + export template (CSV, PDF)
- Monthly chargeback report sample
Last updated: 30 Jun 2025