The details of this part of the workflow can vary depending on how the part was scanned. The general approach starts with ensuring that the individual scan passes that make up a given orientation of the object are aligned to each other.
Once that has been verified, if the part was moved at any point during the scan, then the different orientations captured will need to be aligned to each other – in other words, to “rebuild” the part from the scans. Leaving some overlapping redundant data (Also known as overscan.) can be useful in the first step, but should be removed prior to aligning the different orientations.
This part of the workflow will start to cause problems if poor scanning technique was used to capture data. Large amounts of overscan may make alignment easy, but can lead to problematic results when converting from point cloud into mesh. If redundant data is not removed (This can be done using sampling, combine, or manual deletion.), the mesh may be very rough, or have overlapping faces, which will propagate more issues downstream into the modeling process.