Tester
BOM Diff Checker
Compare two BOM exports locally to see added parts, removed parts, quantity changes, and description changes without forcing the workflow into PLM first.
Previous BOMOlder export
Updated BOMNewer export
5 tracked parts
Qty changed 100-002: 4 -> 6
Description changed 100-003: Motor -> Motor rev B
Removed 100-004 x2 Spacer
Added 100-005 x1 Shim kit
BOM scope
This tool assumes a simple CSV with part number in the first column and quantity in the second column. It is built for fast export-to-export review, not full BOM lifecycle control.
Use this tool when
These are the practical situations where this workflow usually earns its keep.
You have two BOM exports and need to understand what changed quickly.
You want to spot quantity changes and description drift before a release or procurement discussion.
You need a simple summary for a design review without dragging the entire BOM lifecycle process into the conversation.
Mechanical release review
BOM comparison helps teams understand whether a revision changed only descriptions or whether quantities and actual part lists also moved.
Procurement and manufacturing coordination
A concise change summary is useful when supply, manufacturing, or assembly teams need to know exactly which parts shifted between exports.
Design discussion prep
Before a design review, the diff helps isolate whether the release impact is cosmetic, quantity-driven, or a true part-content change.
Common mistakes to avoid
These are the checks that usually keep the output useful instead of misleading.
Using BOM export columns in a different order than the tool expects and then trusting the result without checking.
Treating the summary as a replacement for the engineering reasoning behind the change.
Comparing heavily cleaned exports instead of the real release outputs when traceability matters.
Learn how to use this tool
Compare two BOM exports and surface added parts, removed parts, quantity drift, and description changes before the conversation gets lost in spreadsheets.
Read the guideTell us what is missing
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