Update and Compare Service BOMs

In service-oriented manufacturing and maintenance scenarios, you often need to compare and synchronize similar BOM structures without rebuilding them from scratch. The Service BOM Compare & Update feature lets you compare a source structure with a target structure and selectively apply differences with full user control.

With this feature, you can:

  • Detect insertions, deletions, modifications, and movements based on configured fields and hierarchy context.
  • Review all changes in a structured dialog with clear visual indicators.
  • Apply selected changes to the target while retaining full control over each step, when updates are allowed for the selected target.

The comparison supports:

  • BOM structure (Service BOM lines and sub-lines).
  • Service-relevant line attributes and nested hierarchy context.
  • Field-level differences based on BOM compare field configuration.
  • Recursive comparison for nested Service BOM lines (via the Belongs to Entry No. relationship).
  • Movement consolidation: uniquely detectable parent changes are shown as "Move" (instead of "Insert" and "Delete").
  • User-confirmed updates for full control.

Comparison can be initiated from several sources and applied to the selected target:

  • Service BOM
  • Service BOM Archive
  • Document BOM
  • Document BOM Archive
  • Construction Order
  • Construction Order Archive

A common scenario is Service BOM ↔ Service BOM. The same compare mechanism also supports archive → Service BOM, Document BOM/Construction combinations → Service BOM, and archive ↔ archive for historical version comparison.

Important

Changes are applied only when the selected target supports updates.
If the selected target is an archive (Service BOM Archive, Document BOM Archive, or Construction Order Archive), comparison runs in compare-only mode. In this mode, no changes are written to the archived document and update actions (such as Apply Changes, Move, Skip Modify, etc.) are not available. When comparing two archived versions, both are in compare-only mode.

The scope and usage model of the Service BOM Compare & Update feature includes:

  • Compare scope: Compares a defined source with a defined target, identifies insertions, deletions, modifications, and move-related changes, and allows you to apply selected changes to the chosen target when update actions are available.
  • Recommended practice for reusable structures: Use compare/update to align similar Service BOMs, transfer known-good structures into empty or new targets, and synchronize variants at controlled milestones.
  • Move usage: Movement (re-parenting) is user-initiated through Auto Move or Move. Only uniquely matchable "Insert"/"Delete" pairs are converted; ambiguous cases remain "Insert"/"Delete" for user decision. Out of scope: A generic, rule-based auto-adoption engine and fully simultaneous conflict management across all source systems.

The following table outlines related tasks, with links to the topics that describe them.

To See
Learn how the Insert, Delete, Modify, and Move actions are determined and applied during BOM compare and update. Action Types in BOM Compare
Use the Service BOM Compare & Update feature. Compare and Update Service BOMs

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