screening-then-decomposition

Testing & Quality

Two-phase sensitivity — Morris quick screening to eliminate unimportant factors, then Sobol precise decomposition on survivors. Efficient allocation of analytical effort.

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Screening Then Decomposition

Two-phase approach: quick screening followed by precise decomposition.

Operations

morris-screening → sobol-decomposition → interaction-detection

Available SOPs

Subagent: morris-screening, sobol-decomposition, interaction-detection Import: paper-search

Execution Guidance

Phase 1 (Morris): Screen all parameters, eliminate those with low mu* and low sigma. These are unimportant and can be safely fixed at nominal values.

Phase 2 (Sobol): For surviving parameters, compute precise variance decomposition. First-order indices (Si) measure direct effects, total-order indices (STi) measure direct + all interactions.

Phase 3: Detect significant interaction pairs (STi - Si > threshold). Characterize interaction types and implications.

Minimum Yield

<HARD-GATE>
- Parameters screened: >= 5
- Parameters eliminated (low mu*): >= 1
- Sobol indices computed: >= 3 parameters
- Interaction pairs identified: >= 1
</HARD-GATE>

Available SOPs

Optional, no fixed order; the final leaf is always a sop.

SOP	When to use
deep-insight-paper-search	AI-powered paper summary and search. Import of literature-engine/literature-search skill. AI summary level — cite as "AI-extracted" not "paper states".
interaction-detection	Detect and characterize significant parameter interactions from Sobol decomposition results.
morris-screening	Morris method screening — compute elementary effects to quickly identify important vs unimportant parameters.
sobol-decomposition	Sobol variance decomposition — compute first-order and total-order sensitivity indices for precise variance attribution.