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Design robust lookup formulas for two and three criteria without sacrificing readability or performance.
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Build XLOOKUP or INDEX/MATCH formulas for multi-criteria lookups.
Compound-key lookups fail when key fields are not normalized or when criteria ranges diverge in length. The output may look valid for a subset while silently failing in production rows.
Use Lookup Wizard AI to iterate prompts quickly and validate formula output before shipping to your working sheet.
Normalize keys, validate range alignment, and stress-test duplicates early. Keep fallback logic explicit so missing matches are visible rather than silently mapped to incorrect defaults.
A multi-criteria INDEX/MATCH pattern uses boolean products over aligned ranges and returns first valid match, wrapped with a clear IFERROR policy.
Open Lookup Wizard AI, run one real business scenario, and verify output on a dedicated test range before release.
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