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The mBOM is a part’s planned parts list. See Bills of materials overview for how it relates to the aBOM and build requirements. This page covers building and consuming it.

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mBOM line items

The mBOM table shows these columns per build requirement line: For the GraphQL shape, see mBOMs API.

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Creating an mBOM

  1. Open the parent part in the Parts Library.
  2. Find the mBOM card on the part page. If the part has no mBOM yet, click Create mBom.
  3. With the version in Draft, click New Part and pick the child part. ION adds a line with a quantity of 0.
  4. For each line, set the Quantity and optionally add substitutes, reference designators, and the Made on Assembly and Exclude from Kit checkboxes directly in the row.
Select Exclude from Kit for a line you never want kitted, such as a consumable you draw from line-side stock. ION skips the line when building a kit from this mBOM and when building a kit from a run’s aBOM, so its parts aren’t requested. Edits save as you make them; there’s no separate save step. mBOM lines are editable only while the version is in Draft. For version states and the release flow, see Manage BOM versions.
The mBOM card on the part page is a quick editor. For the full mBOM, including its complete version history, use the Go to full mBom link in the card header.