NUDD Assessment

NUDD identifies where deeper risk analysis and validation are needed. It complements — but does not replace — DFMEA, DRBFM or technical risk assessment.

Score what is New, Unique, Different, and Difficult — then focus engineering effort where uncertainty and opportunity are highest.

Rate each dimension from 0 (none) to 3(high). All dimensions start at 0 — one click per dimension, four clicks per feature.

Feature & Function

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NUDD Question Matrix▾

Reference guide. In the table above, rate each dimension's severity from 0 (none) to 3 (high).

New

  • Has this technology or function been used in our products before?
  • Is it proven in the intended environment and application?

Unique

  • Is this solution specific to this design, customer, or use case?
  • Are comparable references, benchmarks, standards, or field data limited?

Different

  • Does it depart from the current architecture, design practice, material, supplier, or process?
  • Could it introduce unfamiliar interfaces, interactions, loads, or failure modes?

Difficult

  • Does it require unresolved technical learning or a breakthrough?
  • Will design, verification, manufacturing, integration, or scaling be unusually challenging?

Assessment Summary

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Need help applying this to a real validation program? Contact Reliatools.

How to use this

Run this assessment during concept selection, design reviews, or DRBFM/change-point discussions to decide where DFMEA and test-strategy effort should concentrate. For each feature or function, rate all four NUDD dimensions from 0 to 3 in the table; use the question matrix above as a guide. Items scored Medium, High, or flagged Elevated priority need a documented Evidence / Gap entry to be marked complete — but every named item, complete or not, counts toward the summary below.

Example: a feature that introduces a new sensor architecture with limited field data and an unresolved integration question will score High and surface in the top items — even if most other features in the same product are Low or Medium.