An archaeological supervision is no alternative for trial trenching or an excavation. Only in exceptional situations an archaeological supervision can be appropriate:
- When there are physical limitations that prevent adequate research;
- When an area is not deemed archaeologically valuable (a negative selection advice) but one wants to be on the safe side anyway;
- When there are special research questions during construction projects;
- When supervision is needed for minor groundworks in an archaeologically valuable area that is protected.
A design brief should explain the choice for a supervision instead of trial trenching or an excavation. The groundworks must meet certain requirements to guarantee high quality archaeological research.