Modifications are inevitable. Some of our projects have seen installation of foils, flaps, platforms and redesigned sections. More often than not, this requires approval by the authorities because the basis for the original approval has changed. Usually, the analysis requires a partial model of the surrounding structure.
The same applies to analysis of lift points in heavy structures. A partial model is often sufficient. On the other hand, major lifts of large objects or unusual docking situations may require a 'quick' global analysis.