yogsoth-ai Root-Cause Drilling
Drill from surface phenomena to actionable root causes.
When to Use
A gap or problem has been identified but the underlying cause is unclear — need to understand WHY it exists.
Budget
| Base SOP | Target | ±10% Range |
|---|---|---|
| web-search | 30 | 27–33 |
| web-research | 10 | 9–11 |
| paper-overview | 40 | 36–44 |
| paper-search | 25 | 22–28 |
| paper-research | 10 | 9–11 |
State Ledger
<HARD-GATE>
| SOP | Done | Target | % |
|-----|------|--------|---|
| web-search | ? | 30 | ? |
| web-research | ? | 10 | ? |
| paper-overview | ? | 40 | ? |
| paper-search | ? | 25 | ? |
| paper-research | ? | 10 | ? |
Budget Gate: OPEN/CLOSED (>=80% required to exit)
</HARD-GATE>
Available Tactics
- causal-tree-building
Available SOPs
Import: web-search, web-research, paper-overview, paper-search, paper-research Subagent: five-whys-drilling, ishikawa-decomposition, current-reality-tree
Execution Guidance
Start with 5 Whys to drill from surface to root. Use Ishikawa for multi-factor decomposition. Build CRT for formal causal logic. Validate each causal link with literature evidence.
Output Format
Root Cause Report — causal chain, Ishikawa diagram, CRT, validated root causes with evidence.
Available Tactics
Optional, no fixed order; the final leaf is always a sop.
| Tactic | When to use |
|---|---|
| causal-tree-building | Build logical causal trees from symptoms to root causes — list UDEs, connect causal chains, validate logic, locate root causes. Combines ishikawa-decomposition, current-reality-tree, and clr-validation SOPs. |
Available SOPs
Optional, no fixed order; the final leaf is always a sop.
| SOP | When to use |
|---|---|
| current-reality-tree | Build TOC Current Reality Trees — connect Undesirable Effects via sufficient-cause logic to identify 1-3 root causes. |
| five-whys-drilling | Iterative "Why?" questioning (5+ levels) to drill from surface phenomenon to actionable root cause. Each level verified against evidence. |
| ishikawa-decomposition | Decompose problems into 6M categories (Methodology, Data, Theory, Measurement, Researchers, Environment) via fishbone diagram analysis. |