Variance Analysis
Overview
Variance analysis turns “what changed” into “why it changed and what we should do.” Good variance work quantifies price, volume, mix, rate, and timing effects.
When to Use
- Monthly/quarterly performance reviews
- Board and investor reporting
- Flash results and forecast updates
- Cost center accountability conversations
Core Practices
- Bridge actual vs budget/forecast with waterfall logic
- Decompose into volume, price/rate, mix, and timing
- Distinguish controllable vs external factors
- Tie narratives to operational owners and actions
- Focus on material variances; avoid noise
Principles
- A number without a driver story is incomplete
- One-time items should be isolated from run-rate
- Forward-looking implication matters as much as history
- Consistency of bridges builds trust over time
Verification
- Material variances have driver explanations
- Bridges are reconcilable to source data
- Actions or outlook updates follow from the analysis