Excel Formula AIexcelindex matchlookup
8 minINDEX MATCH for Multi-Criteria Lookups in Excel
How to build robust multi-criteria lookup formulas with INDEX/MATCH and dynamic arrays, generated faster with Excel Formula AI.
February 23, 2026
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How to build robust multi-criteria lookup formulas with INDEX/MATCH and dynamic arrays, generated faster with Excel Formula AI.
When to use XLOOKUP, when to keep INDEX/MATCH, and how to avoid lookup regressions in shared models.
Design robust lookup formulas for two and three criteria without sacrificing readability or performance.
Build explicit fallback logic for lookup formulas so model behavior stays predictable under missing or dirty data.