Automated systems that model manual systems and OLRT systems are the two extremes in business event data processing. The systems that mimic manual systems are what we might term pure periodic mode systems in that delay occurs between every step of the processing. On the other hand, OLRT systems represent pure immediate mode systems in that little or no delay occurs between any steps in the processing. We note these as the extremes because many systems lie somewhere between these two extremes by exhibiting a mix of periodic and immediate mode processes at various stages. For example, OLTE used with batch processing results in an immediate mode approach for combining the business event occurrence and record event data steps, whereas periodic mode processing might be used for the remainder of the steps.