# Migration Plan

## Phase 1 — Intake & Inventory
- [ ] Collect CSV/DAX exports and source report screenshots
- [ ] Document data model + relationships
- [ ] Identify all KPIs and filters

## Phase 2 — KPI Definition
- [ ] Translate each DAX measure into deterministic formulas
- [ ] Validate calculations against source data

## Phase 3 — Backend Logic (Local)
- [ ] Implement KPI calculations in JS (no database yet)
- [ ] Build reusable aggregation utilities

## Phase 4 — UI Buildout
- [ ] Recreate filters, charts, and tables
- [ ] Match layout/visual hierarchy

## Phase 5 — Validation
- [ ] Compare KPI outputs to Power BI values
- [ ] Iterate until exact match