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A parameter study regarding the IBIS correlator
Ruprecht Nennstiel1, Joachim Rahm
1Forensic Science Institute of the Bundeskriminalamt Wiesbaden, D 65173 Wiesbaden, Germany. ruprecht.nennstiel@bka.bund.de
Journal of Forensic Sciences
|January 21, 2006
Summary
The Integrated Ballistics Identification System (IBIS) correlator
Area of Science:
- Forensic Science
- Ballistics
- Firearms Examination
Background:
- The Integrated Ballistics Identification System (IBIS) is a global standard for firearm marking comparison.
- User interest is high regarding the hit-detection rates of the IBIS correlator.
- Existing performance data is fragmented and difficult to compare.
Purpose of the Study:
- To systematically present the parameters influencing IBIS correlator success rates.
- To define success and error rates for the IBIS correlator.
- To provide practical recommendations for optimizing IBIS system operation.
Main Methods:
- Re-examination of published test results using a defined methodology.
- Discussion of key parameters affecting correlator performance.
- Development of an illustrative presentation format for success rates.
Main Results:
- IBIS correlator success is highly dependent on the quality of firearm markings.
- Success rates increase with more mark types, signatures per firearm, and inspected hit list items.
- Success rates decrease as database size grows.
Conclusions:
- The quality of ballistic evidence is paramount for IBIS correlator effectiveness.
- System configuration and operational parameters significantly impact hit detection.
- Recommendations are provided for establishing and maintaining effective electronic ballistic evidence collection.
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