Structural integrity
Do identities, required structures and relationships hold?
Review audits ↗
FCTE · Methodology
Understand the model.
Follow the evidence.
Trace the path from reference sources to a released City Twin. Understand what each check establishes and where a further review is needed.
Start with measurable evidence.
Inspect published checks, reproduce the sample results, and see the limits of the available benchmarks.
01 · Evidence chain
From source to released asset.
A useful result has a traceable history. Read each stage alongside the sources, assumptions and checks published for its scope.
01Reference evidence
City, national and global sources.
Find reference sources
02Calibration context
Published targets, historical anchors and calibration categories.
Understand comparisons- 03
Synthetic model
Connected entities and lifecycle behavior.
Explore the model 
04Certification
Structural, temporal and realism checks.
Review certification
05Released asset
A city, version and published evidence state.
Verify release identity
02 · Six review questions
What does each check establish?
Statistical integrity
Do distributions and aggregate behavior remain within the published bands?
Find benchmarks ↗
Historical integrity
Do events respect chronology and known historical anchors?
Review chronology ↗
Privacy assurance
Does the product remain synthetic and non-identifying?
Read use & governance ↗Reproducibility
Can a release be identified and evaluated as a stable asset?
Verify the release ↗Explainability
Can a reviewer trace the sources, assumptions and quality evidence?
Explore the evidence ↗03 · Interpret the result
Structural validity and empirical fit.
Within the model
Structural validation
Release checks assess chronology, integrity and cross-domain consistency within the stated assurance scope.
Inspect audit findings ↗Against external references
Empirical benchmarking
Where suitable external benchmarks exist, compare the reference family, synthetic result, directional difference and disclosed status.
Review the evidence library ↗A passed structural check alone does not establish fitness for every intended use. Read empirical comparisons and disclosed limitations alongside it.
04 · Levels of review
Make the level of review explicit.
These describe distinct kinds of review. A release needs evidence for each level it claims.
- 01
Engine validated
Automated checks executed by FCTE against a release.
- 02
Evidence validated
Selected synthetic measures compared with published benchmark families.
- 03
Independent review
Only claimed when an external institution has reviewed a defined scope. FCTE certification alone does not establish this.
- 04
Customer validated
The customer tests suitability against the empirical context of the intended use.
05 · Release identity
Know what you downloaded.
Covered artifact integrity
Compare the file’s verification value with its release record. Inspect signature state separately.
Open release verifier ↗Public review boundary
Data models, representative relationships, samples, outcomes and audit findings are public. Internal construction methods remain controlled.
Understand the boundary ↗06 · Continue your review