Solvability Factors
How we assess case solvability and why it matters
Solvability Factors
IronCase calculates a solvability score for each case. This page explains what solvability means, how it's calculated, and how to use it.
What Is Solvability?
Solvability assessment predicts the likelihood of clearing a case based on known factors. It emerged from research in the 1970s and 1980s examining why some cases are solved and others aren't.
The Research Foundation
Key studies found that certain factors strongly correlate with case clearance:
- Witness presence — Cases with cooperative witnesses clear more often
- Suspect identification — Named suspects dramatically increase solvability
- Physical evidence — Recovered evidence supports prosecution
- Time factors — Cases with quick response clear more often
These aren't opinions—they're patterns observed across thousands of cases.
What Solvability Is NOT
Solvability doesn't:
- Guarantee outcomes — High solvability cases sometimes go unsolved
- Predict guilt — It measures clearance likelihood, not who did it
- Replace investigation — It's a tool, not a conclusion
- Determine effort — Every case deserves professional investigation
How IronCase Calculates Solvability
IronCase tracks 51 research-backed factors across several categories.
Witness Factors
| Factor | Weight |
|---|---|
| Witness identified | +15 |
| Witness cooperative | +12 |
| Witness statement consistent | +8 |
| Multiple witnesses | +10 |
Suspect Factors
| Factor | Weight |
|---|---|
| Suspect named | +18 |
| Suspect described | +12 |
| Suspect relationship known | +10 |
| Suspect motive apparent | +8 |
Evidence Factors
| Factor | Weight |
|---|---|
| Weapon recovered | +10 |
| Physical evidence at scene | +12 |
| Biological evidence | +10 |
| Video/surveillance available | +8 |
Response Factors
| Factor | Weight |
|---|---|
| Scene properly secured | +5 |
| Response time under 30 min | +5 |
| Scene documentation complete | +5 |
The Score
Scores are calculated by summing applicable factors:
| Range | Assessment |
|---|---|
| 80-100 | High solvability |
| 60-79 | Moderate solvability |
| 40-59 | Challenging |
| Below 40 | Low solvability |
How to Use Solvability
Resource Allocation
Supervisors use solvability to allocate resources:
- High solvability — Ensure adequate resources for quick resolution
- Moderate — Identify which factors might improve with effort
- Low — Consider whether additional resources would help
This isn't about abandoning difficult cases. It's about being realistic about what different cases need.
Prioritizing Effort
Detectives can use solvability to prioritize:
- Which factors are weakest?
- What would improve the score?
- Where should effort focus?
A case with no witnesses but good physical evidence needs different focus than one with witnesses but no evidence.
Tracking Progress
Solvability updates as the investigation progresses:
- Witness found? Score improves.
- Evidence analyzed? Score updates.
- Suspect developed? Major improvement.
Watching solvability change shows whether investigation efforts are producing results.
Limitations of Solvability
Correlation Isn't Causation
Solvability factors correlate with clearance. They don't cause it. A case with poor solvability can absolutely be solved through good investigation.
Not All Factors Are Equal
The research-based weights are averages. In specific cases, a single factor might matter enormously or not at all.
Human Judgment Remains Essential
Solvability is a tool for decision support, not a replacement for investigative judgment. Experienced investigators often sense things the score doesn't capture.
Ethical Considerations
Some worry that solvability could lead to neglecting difficult cases. This is a legitimate concern. The response:
- Every case deserves professional investigation
- Solvability informs resource allocation, not case abandonment
- Supervisors must ensure equity across cases
- Cold case review catches cases that may have been underserved
Solvability and Cold Cases
Cases with persistently low solvability may become cold case candidates. But solvability can change:
What Changes Solvability Years Later
- New witnesses come forward — Relationships change, fear fades
- New evidence technology — DNA, digital forensics improve
- Related cases — Connections to other investigations
- Tips — Someone knows something
Cold cases aren't necessarily low-solvability cases. They're cases where leads ran out. New information can change everything.
Summary
Solvability assessment:
- Based on research — 51 factors validated across thousands of cases
- Updates dynamically — Changes as investigation progresses
- Informs decisions — Helps allocate resources and prioritize effort
- Has limitations — Doesn't replace judgment or guarantee outcomes
- Supports equity — Helps ensure no case is neglected
Use solvability as one tool among many, not as the final word on any case.