design-fmea

name	design-fmea
description	Strategy: Research design-level FMEA — function analysis, failure mode identification, severity/occurrence/detection scoring per AIAG-VDA 2019.
type	strategy
tactics	["failure-chain-tracing","mitigation-validation"]
dependencies	{"tactics":["failure-chain-tracing","mitigation-validation"],"sops":["action-priority-matrix","detection-scoring","failure-chain-construction","failure-mode-extraction","function-analysis","mitigation-design-sop","occurrence-scoring","severity-scoring"]}

Design FMEA Strategy

Systematic failure analysis at the research design level: what functions can fail, how, and with what consequence?

Method

1. function-analysis decomposes artifact into function tree
2. failure-mode-extraction identifies how each function can fail
3. failure-chain-construction builds cause → mode → effect chains
4. severity-scoring, occurrence-scoring, detection-scoring rate each mode
5. action-priority-matrix classifies priority (H/M/L)
6. mitigation-design-sop proposes countermeasures for H-priority items

Budget Table

Parameter	S	M	L
Functions analyzed	4	10	20
Failure modes per function	2	3	5
Chain depth (cause levels)	2	4	6
Mitigations designed	3	8	15

Orchestration

function-analysis → failure-mode-extraction → failure-chain-construction
  → [severity-scoring, occurrence-scoring, detection-scoring] (parallel)
  → action-priority-matrix → mitigation-design-sop
  → re-scoring (mitigation-validation tactic)

Subagents

• function-analysis (decompose function tree)
• failure-mode-extraction (identify failure modes)
• failure-chain-construction (cause-mode-effect chains)
• severity-scoring, occurrence-scoring, detection-scoring (S/O/D)
• action-priority-matrix (priority classification)
• mitigation-design-sop (countermeasure design)

Available Tactics

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

Tactic	When to use
failure-chain-tracing	Tactic: Trace upstream causes and downstream effects of each failure mode. Builds multi-level cause-mode-effect chains for systemic understanding.
mitigation-validation	Tactic: Run mini-FMEA on proposed mitigations to verify they do not introduce new failure modes. Prevents mitigation-induced risks.

Available SOPs

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

SOP	When to use
action-priority-matrix	Compute Risk Priority Number (RPN = S x O x D), classify failure modes into H/M/L action priority per AIAG-VDA tables.
detection-scoring	Rate detectability 1-10 (inverted: 10 = hardest to detect). Estimates how likely current controls would catch the failure before impact.
failure-chain-construction	Build cause-mode-effect chains tracing upstream root causes and downstream cascading effects for each failure mode.
failure-mode-extraction	Extract structured failure mode list from raw scenarios or artifact analysis. Produces standardized failure mode records.
function-analysis	FMEA Step 3: Decompose artifact into function tree — identify what each component is supposed to do before analyzing how it can fail.
mitigation-design-sop	Design prevention, detection, and response measures for high-priority failure modes. Produces actionable countermeasure specifications.
occurrence-scoring	Rate failure mode occurrence probability 1-10. Estimates how likely each failure mode is to manifest during research execution.
severity-scoring	Rate failure mode severity 1-10 based on end-effect impact. Follows AIAG-VDA severity scale calibrated for research artifacts.