Usually a current-state-survey has to be made at the beginning or at the end (z.B.: home construction) of a project. In the beginning, it represents the basis for planning, at the end however it represents a final documentation of the exact realization (construction) of a project.
In the field of engineering geodesy there are different accuracy requirements the surveyor has to handle. The desired specifications will be discussed with the client in advance.
Once the tasks and the scope of work are clear, the ideal measuring methods are chosen based on the specific requirements.