Methodology
How MigrationFit grades, dates and derives public migration data
MigrationFit publishes source-backed indicators with visible source grades, fallback levels, freshness state and null-honest handling.
Source grades, fallback and freshness
Every publishable value is tied to a metric ID, source URL, source owner, observed date, collection date, grain and fallback level.
Grade A is the preferred case: the official source at the right grain. Broader official fallbacks can still be publishable when the metric contract allows them.
Freshness follows the policy of the source itself. Annual, monthly and law-on-change datasets are not treated the same way.
Null-honest values, derived outputs and corrections
When data is missing, MigrationFit keeps the value null-honest instead of guessing. If a broader-grain fallback is shown, the visible label must say so.
Derived outputs such as cost snapshots, salary-to-rent ratios and question-driven reports keep the underlying metric citations so a reader can trace each component back to the original publisher.
If you see a wrong, stale, missing or mis-grained value, use the correction route on the contact page and include the affected page URL plus the official source URL when possible.