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This setting decides whether the mBOM version pinned to a part governs the procedure that assigns from it. It’s independent of Enforce mBOM parts assigned to steps, so you can turn either one on without the other.

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Enable mBOM version selection

  1. In ION, go to Settings > Production > Procedures.
  2. Turn on Enable mBOM version selection.

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What the setting changes

With the setting on:
  • Every part must be pinned to a specific mBOM version before a procedure can be sent for review or released.
  • New runs follow the pinned version instead of the latest released one.
  • The mBOM row in the procedure’s Assigned Parts section carries the version picker and the pin controls. See Switch the pinned mBOM version.
  • Creating a new mBOM revision stops copying part-step assignments onto the new revision for procedures that pin the part, because a new revision is born in draft and an assignment on it would be unreachable.
  • Assigning a sub-assembly’s components needs that sub-assembly’s own pin first, which you set when you assign the sub-assembly in the procedure’s right rail.
With the setting off, a pin recorded on a part is ignored and the part’s latest released mBOM version governs everywhere, so assignments carry forward to a new revision as before.
A draft mBOM version never governs. A part whose only version is unreleased has no governing version at all, in either setting state, so there is nothing to assign from until you release a version.