When you add or edit a Branch Collapsing operation, the Branch Collapsing Operation Editor dialog box opens. Branch Collapsing operations have two sets of parameters, Settings and Conditions.

1. Click the Settings tab to edit settings.
   • Maximum Number of Trimming Levels—Set the maximum number of trimming levels you want to allow. In Branch Collapsing, a single trimming level run to completion would trim every valid branch in the model back by one pipe link. Two trimming levels would trim every valid branch back two pipe links and so on.
   • Load Distribution Strategy—Select what you want to do with the hydraulic load on the sections you trim. The choices are Don't Move Load, which means that the demands are no longer included in the model, or Move Load, which means transfer the demands to the upstream node
2. Click Conditions to edit or create conditions.
3. Click Add to add conditions. You can add pipe and/or junction conditions. You can add more than one condition.
4. Or, select an existing condition and click Edit to modify a selected condition. You can add and edit Junction and Pipe Conditions. You can set select parameters that determine which pipes are included in the skeletonizing process in the Conditions tab. In Branch Collapsing, the junctions referred to (in junction conditions) are the two end junctions of the pipe being trimmed. Tolerances can also be defined for junctions. Tolerances work by limiting the pipes skeletonized only to the ones that have the specified attribute within the specified tolerance. For example, in Branch Collapsing a tolerance on junction elevation of 3 feet would limit skeletonization to pipes that had both end junctions with an elevation within three feet of each other.