v1.0.0 to v1.0.0

---

name: ablation-design

version: 1.0.0

category: experiment-execution

type: strategy

sops:

- ablation-component-mapping

- baseline-selection

- metric-specification

- sample-size-estimation

- statistical-method-selection

---

# Strategy: Ablation Design

**Question**: What does each component contribute?

## Methodology

- **Systematic Ablation** (Newell 1974): Remove one component at a time, measure degradation.

- **Replacement Ablation**: Replace component with simpler alternative to isolate contribution.

- **Combinatorial Ablation** (ABLATOR): Test component subsets to detect interaction effects.

- **Conditional Ablation**: Ablate components under specific data conditions to find context-dependent contributions.

## Execution Flow

1. **ablation-component-mapping** → Map system architecture to ablatable units

2. **baseline-selection** → Select full-system and minimal-system anchors

3. **metric-specification** → Define metrics that capture component contribution

4. **sample-size-estimation** → Determine runs needed for reliable delta estimation

5. **statistical-method-selection** (tactic) → Choose appropriate significance tests for deltas

## Budget Gate

| Ablation Type | Components (N) | Min Runs | When to Use |

|---------------|---------------|----------|-------------|

| Systematic (leave-one-out) | 3-8 | N + 2 | Standard component analysis |

| Replacement | 3-8 | 2N + 2 | Need to distinguish "removal" vs "simplification" |

| Combinatorial (selected) | 4-6 | ~2N | Suspected interactions between components |

| Combinatorial (full) | 3-4 | 2^N | Small systems, need complete picture |

| Conditional | 3-6 | N * conditions | Context-dependent contributions |