Solution

BOM and Alternative-Part Information

Part numbers, packages and substitution relationships should be marked separately so they are not mixed during version handoff.

Details

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Solution focus

Part numbers, packages and substitution relationships should be marked separately so they are not mixed during version handoff.

Engineering basis

IPC-2581 treats the BOM and approved-vendor information as part of manufacturing description data. A project package should distinguish part number, package, key parameters and substitution boundary rather than retain only a part name.

Design focus

Organise the BOM by reference, part number, package and quantity
Mark critical parts, compatibility conditions and non-substitutable constraints
State the preconditions, verification owner and revision impact for alternatives

Grouped components and circuit board pad layout

Recommended information

Part number, brand and package
Confirmed and open material items
Allowed and prohibited substitutions

Handoff and verification

Versioned BOM
Critical-part and substitution-boundary table
Approved-vendor or procurement-source notes

Next collaboration step

After the information for bom and alternative-part information is confirmed, align the functional, interface, material, assembly and revision information before the next solution discussion.

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