Old scores are not re-run.
A score issued under an earlier version stays the record of what was issued and states its version; scores are never retroactively restated when the model changes.
Pillar 03
Model Versions
Once a carrier or lender prices against a version of this model, that version is a commitment — changes ship as new versions with an effective date and changelog, and every issued score states which version produced it.
RegistryIn force
The version that is in force.
TIM v1.0
First published version of the Threat Impact Model.
- Six weighted layers as above.
- Standard weighting 30/15/20/15/12/8; oil & gas sector profile re-weights to 18/17/23/20/17/5.
- Thirteen grade bands from A+ to F.
- Data-confidence assessment that withholds credit the evidence doesn't support.
- Distance-squared decay on crime events to a 1,600m radius, with severity and age weighting.
How versions are handled
Two commitments.
Scores predating versioning.
Assessments issued before the registry existed are labelled unversioned rather than back-dated into a version they never ran under.