You cannot manage what you cannot see
Imagine receiving a credit card bill with a single line item: "Purchases: $47,000." You know you overspent, but you have no idea where. That is what cloud billing looks like without the Inform phase. The first phase is entirely about creating visibility — breaking that single number into meaningful, attributable, actionable data.
Key Activities in the Inform Phase:
1. Allocation — Assigning costs to owners
Cloud providers bill the account, not the team. Allocation is the practice of mapping raw cloud spend back to the business units, products, or teams that generated it. The two models are:
- Showback: "Here is what your team spent." Informational only. No money actually moves.
- Chargeback: "Here is what your team spent, and we are deducting it from your budget." Real financial accountability.
The primary mechanism for allocation is tagging — attaching metadata key-value pairs to cloud resources (e.g., team: payments, env: production, product: checkout). Without consistent tagging, allocation is guesswork.
2. Benchmarking — Understanding if your spend is normal
Once you can see costs, you need context. Is $0.03 per API call expensive or cheap? Benchmarking compares your unit economics against industry peers, your own historical baselines, or internal targets. The FinOps Foundation publishes anonymized benchmarking data across industries for this purpose.
3. Budgeting and Forecasting — Predicting the future
Historical spend data feeds forecasting models. Finance teams need to know what cloud will cost next quarter to plan headcount and margins. Engineering teams need budget guardrails so they know when they are approaching limits. Forecasting in the cloud is harder than on-premises because spend is elastic — a traffic spike or a new product launch can double costs overnight.
Goal of the Inform Phase: Provide near-real-time visibility so that every engineer can see the cost impact of their code changes, and every finance partner can attribute spend to business outcomes.
Interviewers frequently ask: "What is the difference between Showback and Chargeback, and when would you use each?" The correct answer is that Showback is a stepping stone — it builds cost awareness and accountability culture without the political friction of actually moving money. Chargeback is the mature model but requires clean tagging and organizational trust. Most companies start with Showback and graduate to Chargeback over 12–18 months. Saying "it depends on organizational maturity" is a strong, defensible answer.