PURCHASING GUIDE
How to prepare a BOM for a sourcing inquiry.
A clear BOM preserves the original part requirement and gives every quantity, deadline and approval condition a place.
1. Keep one requested part on each line.
Use a stable line number or internal item reference. Copy the complete manufacturer part number, including suffixes and punctuation, into its own field. Put the manufacturer name in a separate field. If a reference is incomplete, mark the missing detail instead of guessing.
2. State quantity, unit and timing.
Distinguish pieces from reels, packs or other units. Give the required quantity and date for the current request. Put forecasts or later releases in separate fields so they are not mistaken for an immediate requirement.
3. Record the conditions that affect acceptance.
Include required packaging, manufacturer restrictions and documentation needs. Keep requirements that apply to the whole list in a short note, and put exceptions next to the relevant line. Mark which conditions are mandatory.
4. Separate approved parts from possible alternatives.
Keep your approved part number as the original requirement. If you are open to alternatives, add a separate note describing the review process and evidence needed. Do not overwrite the requested part with a similar-looking code; an alternative requires its own engineering assessment.
5. Check the list before sending.
Look for duplicate lines, blank quantities, inconsistent units and truncated part numbers. Preserve leading zeros and text formatting in spreadsheet part-number columns. If the same part appears more than once, clarify whether the quantities should be combined or belong to separate builds.
Suggested columns
Line reference · Manufacturer · Full part number · Quantity · Unit · Required date · Packaging · Documentation requirements · Approval notes
Useful context
Include your company email, project or purchasing reference, build stage and priority items. Provide the destination where it affects the requirement, and explain any uncertainty in the list.
Send the original requirement clearly.
The inquiry form accepts a pasted list or a supported BOM attachment. Keep a copy of the version you send so later questions and revisions can refer to the same line numbers.
Your BOM is ready for the next step.
Send your list with the quantities and priorities your purchasing team wants to discuss.