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---
name: concept-fan
description: "Expand from purpose to concepts to directions to ideas (de Bono Concept Fan)"
execution: strategy
used-by: lateral-thinking
---
# Concept Fan
Expand thinking from purpose through concepts to directions to ideas using de Bono's Concept Fan technique. Move between levels of abstraction to find new approaches.
## State Ledger
| Resource | Target | Current | % |
|----------|--------|---------|---|
| web-search | 20 | 0 | 0% |
| web-research | 8 | 0 | 0% |
| paper-overview | 20 | 0 | 0% |
| paper-search | 12 | 0 | 0% |
| paper-research | 5 | 0 | 0% |
## HARD-GATE
Cannot exit strategy until ≥80% of each budget line is consumed OR yield targets are met with justification for remaining budget.
## Available Tactics
| Tactic | Role |
|--------|------|
| concept-hierarchy | Build concept levels from purpose through concepts to ideas |
## Available SOPs
| SOP | Role |
|-----|------|
| concept-fan-expansion | Expand fan from purpose → concepts → directions → ideas |
| escape-technique | Escape dominant concept to find alternative concepts |
| fractionation | Split broad concepts into finer units |
| alternatives-generation | Generate alternative ideas at each level |
| lateral-synthesis | Synthesize concept fan outputs |
## Execution Guidance
1. **Define purpose**: Clarify the ultimate purpose (rightmost point of fan)
2. **Identify concepts**: Find broad approaches that serve the purpose
3. **Generate directions**: For each concept, identify specific directions
4. **Produce ideas**: For each direction, generate concrete ideas
5. **Escape and expand**: Use escape-technique if stuck at any level
6. **Synthesize**: Produce structured output via lateral-synthesis
