1. A method of monitoring a plurality of operations performed by a machine of the type in which a plurality of feed stations selectively feed documents onto an insert track for inclusion with a group of related documents, said method comprising the steps of: establishing an initiation time for a first time base during which said plurality of operations are to be monitored; counting, over said first time base, the number of events associated with each of said plurality of operations; establishing at least a temporary termination time for said first time base at which said count is at least temporarily terminated; and, averaging the number of events counted over said first time base to obtain an indication with respect to one of said operations of the number of events occurring per unit of time.