How Does the Observation Strategy Influence the Correctness of Alerting Services?

Application fields of alerting services range from digital libraries to air traffic control. The services therefore underly different requirements regarding correctness, response time and completeness of information about observed events. This paper shows the influence of applied observation and timestamping strategies on the correctness of the event notifications. Several time systems have been evaluated. We show the implications of exemplary combinations of time systems and observation strategies.