Excel VLOOKUP Data Matching Help

I need to streamline data matching across several Excel sheets, and the heart of the task is a solid, error-proof VLOOKUP setup. The workbook already holds formulas such as INDEX, SUMIF, COUNTIF and a dash of conditional formatting, but the matching logic built with VLOOKUP is where I’m running into trouble.

Here’s what I’m hoping to achieve:
• One-click refresh that pulls the correct row every time, even when source tables expand.
• Clear handling of #N/A and other common lookup pitfalls so the model stays clean for non-technical users.
• A concise walk-through (comments or short notes in the file) explaining how the lookup range names, absolute/relative references and any auxiliary columns fit together.

If you’ve done this kind of work before—especially with large, frequently updated lists—your experience will be the deciding factor. Feel free to outline similar projects you’ve completed or any clever techniques you rely on for reliable lookups.

The deliverable is the updated workbook with functioning VLOOKUP formulas and brief inline documentation, ready for me to drop fresh data into without breaking.