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Each affected item has a change type, defaulting to Version. The type determines which draft fields are editable and what release creates. The four types differ by whether they have a predecessor and whether the result keeps the same part number.

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The four types

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When to use which

  • Version — use for manufacturing-method changes that do not require a new item revision or stock phase-over.
  • Revision — the part is formally revising (new drawing revision, new dimension) and you want old and new to coexist while stock phases over. This is the everyday engineering-change case. You can name the revision (for example A) when you add the item, or leave it blank to take the next revision automatically.
  • Replacement Part — use for a one-to-one replacement with a new part number derived from the old part.
  • New Part — you’re introducing a genuinely new part under change control, with no old part behind it. Nothing is superseded. This is also how a consolidation is modeled: when several components collapse into one, the consolidated “1” is added as a New Part and the old lines are dropped from the parent assembly’s draft BoM.

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What each type gates

Change type also controls the editable surface on the affected item:
  • Version exposes the Bill of Material and Bill of Process editors on the draft method.
  • Revision, Replacement Part, and New Part add Part Properties (attributes) and documents on top of BoM and BoP, because each is producing a genuinely new item, not just a new recipe.

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Add a net-new part

Choosing New Part in the change-type selector swaps the affected-item modal to a short mint-a-part form: Submitting creates an inactive Part and adds it as a New Part affected item. The part remains hidden until release.

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Supplier parts on a purchased line

A Revision, Replacement Part, or New Part whose draft item is purchased (Buy or Buy and Make) gets a Supplier Parts grid on its line, right alongside the properties editor. You use it to set up how the new part or revision is bought: Supplier, Supplier ID (the supplier’s own part number), Unit Price, Unit of Measure, Minimum Order Quantity, and Conversion Factor. Add, edit, and delete rows here the same way you would on a live part. A Revision draft starts with the source revision’s supplier parts and their price breaks, along with its batch size, scrap percent, lead time, reordering policy, preferred supplier, and item group. It releases ready to plan and buy, so edit the grid only where the new revision differs. The change notice’s changes list only the suppliers you added, changed, or removed.