An apparatus and method provides dynamic schedule mediation by scheduling and monitoring appointments between a service provider and customers. The apparatus and method uses a statistical analysis to determine a best appointment time based on at least one of: historical performance patterns, the type of service requested during the appointment, geographic location of the customer or the service provider, time of day, time of year, weather, skills of the service provider, and automobile traffic conditions. The system and method continuously monitors changes to the appointment initiated by the customer or the service provider and notifies the other. The statistical information of a service provider may also be used to evaluate the rules of the service provider and to evaluate individual field service personnel of the service provider.