Information about the basic concepts of surveillance: Surveillance expresses the observation of known processes or phenomena. This method is widely used in scientific research. The clarity of the surveillance object, metrics, and the degree of subjectivity entered from the observer side play a role in the basic concepts of surveillance. Objectivity plays an important role in surveillance. In scientific research, information collected through surveillance can be subjected to statistical analysis, which leads to a better understanding of processes or phenomena. Metrics measurements, for example, may be related to units of time, time intervals, and continuity of surveillance